{"product_id":"filamented-goby-rhinogobius-filamentosus","title":"Filamented Goby - Rhinogobius filamentosus","description":"\u003cdiv data-page-id=\"VKnffK9qBdJRbCcD4FccpN3hnbf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-OKFff3ICHd3WsicjOzecBfw6ntU\"\u003eI. Species Overview\u003c\/h2\u003e\n\u003ch3 data-start=\"223\" data-end=\"249\"\u003e← Back \u003ca href=\"https:\/\/eiraaquatics.com\/collections\/goby\"\u003eGoby\u003c\/a\u003e (genus overview)\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-QAPnfGLqed9fBbcOab2crS8Znxh\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv data-page-id=\"VKnffK9qBdJRbCcD4FccpN3hnbf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-SZxqfJDjLdDHg8cu3FDcgnKvnAg\"\u003eTaxonomic Information of *Rhinogobius filamentosus*:\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-GZDDfSWG6dND9KcHt35c1Y96nme\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eGenus: \u003cstrong\u003eRhinogobius\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-LMHgfSRTqdpReacakL3camNtnuc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eFamily: Gobiidae\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Mqf4fgHgzdOxGlcfBhOckKBFnz0\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eOrder: Perciformes\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Mqf4fgHgzdOxGlcfBhOckKBFnz0\" data-list=\"bullet\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv data-docx-has-block-data=\"false\" data-lark-html-role=\"root\" data-page-id=\"VKnffK9qBdJRbCcD4FccpN3hnbf\"\u003e\n\u003cdiv class=\"old-record-id-D25yfkb6qdDP8McJ3JWc39Jwnad\"\u003eSpecies: \u003cstrong\u003e*Rhinogobius filamentosus*\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cspan class=\"lark-record-clipboard\" data-lark-record-format=\"docx\/text\" data-lark-record-data='{\"rootId\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Species: *Rhinogobius filamentosus* \"},\"attribs\":{\"0\":\"*0+9*0*1+q*0+1\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"],\"1\":[\"bold\",\"true\"]},\"nextNum\":2}},\"type\":\"text\",\"referenceRecordMap\":{},\"extra\":{\"channel\":\"saas\",\"pasteRandomId\":\"e3931418-de2d-4161-89fe-8e1ac4238a54\",\"mention_page_title\":{},\"external_mention_url\":{}},\"isKeepQuoteContainer\":false,\"isFromCode\":false,\"selection\":[{\"id\":1018,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":36},\"recordId\":\"D25yfkb6qdDP8McJ3JWc39Jwnad\"}],\"payloadMap\":{},\"isCut\":false}'\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-LJuFfbdhAdpKYbcKaOUcL4K0nTb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eCommon Name: Labyrinth Rhinogobius,\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-LJuFfbdhAdpKYbcKaOUcL4K0nTb\" data-list=\"bullet\"\u003eChinere name：丝鳍吻虾虎 ,named for the unique labyrinthine patterns on its cheeks\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-G0dPfg4yDd9wpZcWG23cfIrdnMS\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eEcotype: Small benthic freshwater fish\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Y3zWfLj0udufUWcK7QAcukS6nhg\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eDistribution: Endemic to rivers in southern China\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cspan data-lark-record-data='{\"isCut\":false,\"rootId\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"parentId\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"blockIds\":[890,891,892,893,894,895,896,897],\"recordIds\":[\"PqrYfdggYd8Hw7cT2j0c4OPCnNb\",\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\",\"GZDDfSWG6dND9KcHt35c1Y96nme\",\"LMHgfSRTqdpReacakL3camNtnuc\",\"Mqf4fgHgzdOxGlcfBhOckKBFnz0\",\"LJuFfbdhAdpKYbcKaOUcL4K0nTb\",\"G0dPfg4yDd9wpZcWG23cfIrdnMS\",\"Y3zWfLj0udufUWcK7QAcukS6nhg\"],\"recordMap\":{\"PqrYfdggYd8Hw7cT2j0c4OPCnNb\":{\"id\":\"PqrYfdggYd8Hw7cT2j0c4OPCnNb\",\"snapshot\":{\"type\":\"heading1\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Species Overview\"},\"attribs\":{\"0\":\"*0+g\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\":{\"id\":\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\",\"snapshot\":{\"type\":\"text\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Taxonomic Information of *Rhinogobius filamentosus*:\"},\"attribs\":{\"0\":\"*0+1g\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"GZDDfSWG6dND9KcHt35c1Y96nme\":{\"id\":\"GZDDfSWG6dND9KcHt35c1Y96nme\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Genus: Rhinogobius\"},\"attribs\":{\"0\":\"*0+7*0*1+b\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"],\"1\":[\"bold\",\"true\"]},\"nextNum\":2}},\"align\":\"left\"}},\"LMHgfSRTqdpReacakL3camNtnuc\":{\"id\":\"LMHgfSRTqdpReacakL3camNtnuc\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Family: Gobiidae\"},\"attribs\":{\"0\":\"*0+g\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"Mqf4fgHgzdOxGlcfBhOckKBFnz0\":{\"id\":\"Mqf4fgHgzdOxGlcfBhOckKBFnz0\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Order: Perciformes\"},\"attribs\":{\"0\":\"*0+i\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"LJuFfbdhAdpKYbcKaOUcL4K0nTb\":{\"id\":\"LJuFfbdhAdpKYbcKaOUcL4K0nTb\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Common Name: Labyrinth Rhinogobius, named for the unique labyrinthine patterns on its cheeks\"},\"attribs\":{\"0\":\"*0+2k\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"G0dPfg4yDd9wpZcWG23cfIrdnMS\":{\"id\":\"G0dPfg4yDd9wpZcWG23cfIrdnMS\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Ecotype: Small benthic freshwater fish\"},\"attribs\":{\"0\":\"*0+12\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"Y3zWfLj0udufUWcK7QAcukS6nhg\":{\"id\":\"Y3zWfLj0udufUWcK7QAcukS6nhg\",\"snapshot\":{\"type\":\"bullet\",\"parent_id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"comments\":[],\"revisions\":[],\"locked\":false,\"hidden\":false,\"author\":\"84029267776871\",\"children\":[],\"text\":{\"initialAttributedTexts\":{\"text\":{\"0\":\"Distribution: Endemic to rivers in southern China\"},\"attribs\":{\"0\":\"*0+1d\"}},\"apool\":{\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"]},\"nextNum\":1}},\"align\":\"left\"}},\"VKnffK9qBdJRbCcD4FccpN3hnbf\":{\"id\":\"VKnffK9qBdJRbCcD4FccpN3hnbf\",\"snapshot\":{\"align\":\"\",\"author\":\"84029267776871\",\"children\":[\"PqrYfdggYd8Hw7cT2j0c4OPCnNb\",\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\",\"GZDDfSWG6dND9KcHt35c1Y96nme\",\"LMHgfSRTqdpReacakL3camNtnuc\",\"Mqf4fgHgzdOxGlcfBhOckKBFnz0\",\"LJuFfbdhAdpKYbcKaOUcL4K0nTb\",\"G0dPfg4yDd9wpZcWG23cfIrdnMS\",\"Y3zWfLj0udufUWcK7QAcukS6nhg\",\"MjGifIzVId2qcrcB9bIc94Stnbh\",\"F3hpf0mPsdO1a5cV0MTc86bjnaf\",\"GPdwfRqR8dtgDZcMqsZckBhcnUg\",\"KqPxf9mFtdMcphceWsscQmuqn2c\",\"GafOflXQLdzxuPcJeSrcP83unBh\",\"Wsg3fPrPZdWlIMc5uR3cstADnVc\",\"N2DxfHeUUdWducc74o9cBFnPnFd\",\"Cd7Df5JEodsQLsc6kCkcjku3nuh\",\"Ef3Cfo3sBd5Ig6cWWnfcUTfenkc\",\"Hia4fKIWcdvsK9cpLzucCZzwnRE\",\"L1L9fdIbPdtQwicu3czcYXPlnxe\",\"YfCXfXgY9dy1PocRa3oc0glHnjW\",\"Dow9f3OdpdAjpcc98vdcx0W1nAb\",\"DaDlfuJWSdVWKccAkrjcKulAnch\",\"YqGHfTjgydEZbTcWZKVcVsEVnCf\",\"R1IlfYshBd2btjcAwcycrNopnzh\",\"JYEjfTN3fdqBMrc0njDcABnBn7f\",\"VahyfUb8xdMIIBcwS6qc4N2Tn6d\",\"P9oxfnc9rdTTyAcekHYcFbmmnme\",\"BnAefYHegdEIleczU7LcpVHdnNo\",\"ZUX1fM6FMd79qMcNrT9cdEa1nqp\",\"XJ5WfuMLKd9TyQc7B0JcIbr5nQi\",\"UQEAfalBVdxvsjcLt6ccg7Bbn4b\",\"H4azfaG6Ed4qlfcfTcYcMlJLnzc\",\"AJ9TfbJHUdMovMcFq0icsmLVnQh\",\"WHuifn8ljdjmdOcac0fcFKl6nid\",\"Bi0AfPwoTdbMJgc74VHckV7Bnhb\",\"Akvmf8DXDdatU4cwkZWc3hksnUg\",\"OZFIfcpdTdOjkNcwJcNcBvhQnIf\",\"OqVWfSa7adsuXDcnx5gcjtj4nYc\",\"Js5dfJbqMdyXmucrPjDcWrkPn1c\",\"DAcafoNq3d1jykcDultceBj0nbb\",\"Wz4WfUCbSdPk7PcFYgdc4YUNnhh\",\"PN6rfN9ZYdpy0mcBU4PcIYEMnfb\",\"NKPuf9y0MdEwDpcZ8IJc1vMrndc\",\"NpOMf7zYfdgstBcvKAvc3GC9nne\",\"FfIrfpneedDNjJcR16xcdfvJnjy\",\"XOQNfIeRxdBJ1zcUTlUcjEdznje\",\"Oe9pfNpAKdxDf4cOS7EczoGknrc\",\"NSerfmjOMdVamjctB8tczqXinnh\",\"HDiCfgfyEdwmPuc3I7Fcj8c0nUd\",\"XWhufktV1dAZE4cszcNcCkJbneb\",\"WA7Kfc4CPdQYCFcwH5fcNccunVg\",\"RqIpfvKX2dxa4Ycx3R9cZwoNn7e\",\"YZM2fWxGHdKEj4cwaiScw1KZnH8\",\"AdNSf9dQCdEh4mckgKOc51X7nfe\",\"Cn6VfUCNpdE0GtcOK84cIQhtnRd\",\"KQLBfbymodRjmGcfdQYcornHnkh\",\"EwNYfhcc3d50y5cpjNXcMXgnnUc\",\"DbSEfeu6hdEiSPchObfc0yKCndb\",\"HRK8fyn56dEMXJcIhMNcHjo0nAf\",\"FpwvfJ1KhdXbNOc4xVOcc8aCn5b\",\"EwSJf44NcdIMbxcDqtAcLsYdnNc\",\"QAIhfxZ9vdY10cc73ZJcvX63nIh\",\"YbFyfMLObdbFHRc0MzEcffUWnmh\",\"TVdqfTdUCdInJfcecZ5cXsnTnfg\",\"WXwKfrLZ6d4hCuciYbRcUmifnvg\",\"SOhTfOEDFdOsR8cXASvcedkhn4g\",\"UX16fE8bldbGbWcxQJbcstmLnwb\",\"Yaeifk6BBdv1b4cuSrpcrhAanSf\",\"ZMDmfYfybdiqRlc7Ucxc48wtnRc\",\"PxbxfLJyXdSxzvc60ktcNPmDn5b\",\"EABXfh76MdXHLnc2UzXcpwkInOb\"],\"comment_container_id\":\"QGK4f8gwnddIHPcYmbFcEgFonuc\",\"comments\":[],\"doc_info\":{\"deleted_editors\":null,\"editors\":[\"84029267776871\"],\"option_modified\":null,\"options\":[\"editors\",\"create_time\",\"edit_time\"]},\"hidden\":false,\"locked\":false,\"parent_id\":\"\",\"revision_container_id\":\"DypWfZtzhdnkWic5rUMc5pr6n8d\",\"revisions\":[],\"status\":{\"streaming\":{\"enabled\":true,\"expired_at\":\"1769663896\",\"source\":1,\"operator_id\":\"84029267776871\",\"is_create_command\":true}},\"text\":{\"apool\":{\"nextNum\":2,\"numToAttrib\":{\"0\":[\"author\",\"84029267776871\"],\"1\":[\"ai-extra\",\"{\\\"is_ai_gen\\\":true,\\\"rewrite_command\\\":1}\"]}},\"initialAttributedTexts\":{\"attribs\":{\"0\":\"*0*1+1q*0*1+l\"},\"text\":{\"0\":\"Filamented Rhinogobius (*Rhinogobius filamentosus*) – Complete Encyclopedic Profile\"}}},\"type\":\"page\"}}},\"payloadMap\":{\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\":{\"level\":1}},\"extra\":{\"channel\":\"saas\",\"pasteRandomId\":\"ca0657fd-e784-4905-91e6-58370298bcee\",\"mention_page_title\":{},\"external_mention_url\":{}},\"isKeepQuoteContainer\":false,\"selection\":[{\"id\":890,\"type\":\"text\",\"selection\":{\"start\":3,\"end\":19},\"recordId\":\"PqrYfdggYd8Hw7cT2j0c4OPCnNb\"},{\"id\":891,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":52},\"recordId\":\"SZxqfJDjLdDHg8cu3FDcgnKvnAg\"},{\"id\":892,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":18},\"recordId\":\"GZDDfSWG6dND9KcHt35c1Y96nme\"},{\"id\":893,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":16},\"recordId\":\"LMHgfSRTqdpReacakL3camNtnuc\"},{\"id\":894,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":18},\"recordId\":\"Mqf4fgHgzdOxGlcfBhOckKBFnz0\"},{\"id\":895,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":92},\"recordId\":\"LJuFfbdhAdpKYbcKaOUcL4K0nTb\"},{\"id\":896,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":38},\"recordId\":\"G0dPfg4yDd9wpZcWG23cfIrdnMS\"},{\"id\":897,\"type\":\"text\",\"selection\":{\"start\":0,\"end\":49},\"recordId\":\"Y3zWfLj0udufUWcK7QAcukS6nhg\"}],\"pasteFlag\":\"755656bf-53c2-49d9-9185-2dfe408a8290\"}' data-lark-record-format=\"docx\/record\" class=\"lark-record-clipboard\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-Df4ufyYwsd9QGacqx10cWyeAndD\"\u003eThis species is highly distinctive and consistently exhibits three diagnostic characteristics regardless of regional differentiation:\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Cx9SffcCsdPETZcycq9cFleqnhb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eIn males, the 3rd and 4th spines of the first dorsal fin are notably elongated into \u003cstrong\u003efilaments\u003c\/strong\u003e;\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-JRlufF1uvdbkS4cuROWcOysKnLc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eThe cheek bears a characteristic labyrinthine or vermiculate reddish-brown pattern;\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-TyuQfw4YedriPDcSzQMcfyqqnIe\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eThe branchiostegal membrane is marked with small red spots or patches.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-HInLfSuohdCMmNctxMacRPBOnxg\"\u003eThe so-called Strawberry Filamented Rhinogobius is not a separate species, but a stable regional phenotype of *Rhinogobius filamentosus* from river systems in Guangxi. It is named for its striking gill membrane pattern: a bright red base densely covered with fine white spots.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-FmYtfEFO9da0KrcIvBEcGCQWnVd\"\u003eThis pattern is highly stable and can be maintained at optimal intensity in captivity through precise temperature control and regular live food feeding. It is widely regarded as a centerpiece species in native biotope aquariums and is highly prized by native fish enthusiasts for its exceptional ornamental value.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-N9n6ft845dHRwFcxhiacpBX0nBf\"\u003eThe species shows strong adaptability and excellent disease resistance, combining both scientific research value and commercial importance in the native aquarium trade, making it a classic choice for stream-style biotope tanks.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-Z5F7fNYeBdpAzyc6vxwcyRPRnfg\"\u003eII. Coloration and Morphological Features\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-DumlfHLRYdTwFOcx1g0cPEXTnRk\"\u003e(1) Standard Morphology\u003c\/h3\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-Rgh8f9ukhdHrZicAT29c5HDRnUb\"\u003eBody Size and Shape\u003c\/h4\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-N1YhfnZmwdZKOBcJCogcJblXnRd\"\u003eAdults of the standard form measure 5–7 cm in total length. The body is slender and cylindrical, robust anteriorly, gradually compressed laterally toward the caudal peduncle, with a well-proportioned outline and smooth musculature. Males are slightly larger and more robust than females.\u003c\/div\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-D2sbfLHdQdumBCcOsp4cDplznnd\"\u003eFin Characteristics\u003c\/h4\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-LokbfZvwKdVHCccqPI8ceb8qnbg\"\u003eThe first dorsal fin is slightly lower than the second. In mature males, the 3rd and 4th spines of the first dorsal fin are filamentous and elongated, often reaching beyond the base of the second dorsal fin when folded. Females lack these filaments or have only very short ones.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-DVspfJsxLdsoozcfoEkcamI9n4e\"\u003eThe posterior rays of the second dorsal fin are elongated; the caudal fin is fan-shaped. The anal fin is primarily reddish, with neatly arranged rays and no deformities.\u003c\/div\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-FZsYfCZ0ldA1Klc6wCkcBOzsnUe\"\u003eBody Color and Markings\u003c\/h4\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-HYx1fUbZRdI2q0cdyH2cQHysnSe\"\u003eThe base body color is tan to brownish. The flank displays 6–9 dark, somewhat rectangular blotches, whose intensity varies with mood and surroundings.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-U4kGfJ8cld7zNZcP6gtccu8MnBf\"\u003eThe cheek features an irregular, continuous labyrinthine reddish-brown pattern. The branchiostegal membrane has moderately dense small red spots on a pale background.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-JPWcfZ3U8dQZVacpNuXcIgqunQe\"\u003eA small blue spot is often present on the fin membrane between the 1st and 2nd spines of the first dorsal fin. This is recognized as an auxiliary identifying trait among hobbyists; it may be faint or absent in females and some regional populations, and is not a primary diagnostic feature.\u003c\/div\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-VPilfnmZidYtQdcA9EvcxT25nbZ\"\u003e(2) Strawberry Regional Phenotype\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-V4dQftB4Odwxinc1M0gcIPEGnjg\"\u003eAs a prominent regional form of *Rhinogobius filamentosus*, the Strawberry phenotype retains all core diagnostic traits, with enhanced ornamental characteristics:\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-GYMTfFmrTdJtqoch44PcM5A2nkc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBody Size\u003c\/strong\u003e: Adults may reach 8–10 cm, making it the most robust form within the species, with a thick, muscular body and strong visual presence.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-PL74fQTCddXkINciqpYc68QhnYe\" data-list=\"bullet\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eColoration\u003c\/strong\u003e: The branchiostegal membrane shows a vivid red base densely covered with evenly sized, highly saturated white spots — the origin of the “Strawberry” name. Cheek labyrinth patterns are darker and bolder with greater continuity. Overall body color is deeper and intensifies further during the breeding season.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-RCzSfgx6Idug0fcnd6Ec9SVrnae\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eFins and Temperament: The dorsal filaments are longer and thicker; when fully extended, they may nearly reach the base of the caudal fin. The margins of the second dorsal and caudal fins often show a faint orange-red tint. Although slightly more assertive than the standard form, it still exhibits only weak territoriality, with generally mild agonistic behavior.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-IdLPfEyvwdHPtGcXRbWcWDFlnnb\"\u003e(3) Sexual Dimorphism\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-O4QOf41ZQdLdifc9M4Yc6MKLnHL\"\u003eFemales are smaller (4–6 cm), with paler, yellowish-tan base coloration. Cheek patterns and gill spots are faint, and filamentous dorsal extensions are absent.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-DiOxfTlfGd4PNCchXbFcUL0enqh\"\u003eMales display brighter coloration, well-defined markings, and prominent fin filaments. During the breeding season, males intensify coloration and perform frequent fin displays to establish dominance and court females.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-ApsgfFI8MdisGCcsNdUcGExDn8f\"\u003eIII. Distribution and Habitat\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-RHl1f7VsJdalXKc3VR8czIhNnke\"\u003e(1) Geographic Distribution\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-DunRfcmmOdXBiocjUlCc79CSnNb\"\u003e*Rhinogobius filamentosus* is distributed across southern China, with core populations in Guangxi, Hunan, and Guangdong. In Guizhou, it occurs only sporadically in southern river basins bordering Guangxi and is not part of the core distribution range.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-WV2GfYMRxd0ck7ch1gQcJVYBndd\"\u003eThe Strawberry phenotype is concentrated in river systems of Shangsi, Xiuren, Liuzhou and surrounding areas in Guangxi, where it represents a dominant local form.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-OVoGfpsJ9d7P1BcYy09c3pS0n3d\"\u003ePopulations from Hunan, mainly in tributaries of the Xiang River (Yongzhou, Chenzhou regions), more closely resemble the ancestral standard form. Other regional populations show minor differences in body size and color intensity due to geographic isolation, but all retain the same core diagnostic features.\u003c\/div\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-XIgAfj7F9d3BPtcsjuhc62LRnif\"\u003e(2) Natural Habitat\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-I9bFfyVw9dHDH7cL0mSceQTvnpe\"\u003eThis species inhabits clear, well‑oxygenated mid‑to‑lower reaches of streams and rivers, favoring shallow areas with gravel substrates, moderate flow, and abundant shelter such as rock crevices and aquatic vegetation.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-WjCRfQX3gd9w1Uc8fJBcI9PxnAe\"\u003ePreferred water conditions:\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-KgvHfcu3SdvJ4oc3WKecthrfnXf\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eTemperature: 18–25 °C\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-QF06fBJoUdLnGCcrkT8cpF99ntw\" data-list=\"bullet\"\u003e\n\u003cdiv\u003epH: 6.5–7.5\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-UpdRfbcZudli5Acrkl1ctzvNnuf\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eHardness: soft to neutral, 5–15 °dGH\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-EFNAfYxQidPUcFc2P2UcRAuFn7b\"\u003eIt has low tolerance to sudden temperature fluctuations, with an upper thermal limit of approximately 30 °C.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-ChkafXDoCdN72JcQrpJcEHPun8f\"\u003eIn the wild, it is a benthic carnivore, feeding mainly on aquatic insect larvae and small crustaceans, often resting on rock surfaces or moving among gravel. Overall temperament is gentle, with only weak aggression and territorial behavior.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-YvkGfzyG3dUUH0cf9igcoYjRnBh\"\u003eIV. Regional Differentiation and Identification\u003c\/h2\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-RuPhfMF3mdCUmGcKFLncP7IHnHb\"\u003eDue to its wide distribution and geographic isolation, *Rhinogobius filamentosus* exhibits mild regional differentiation. Differences are primarily seen in body size, color intensity, density of cheek labyrinth patterns, and abundance of gill spots. For example, populations from the Xiang River in Hunan tend to be more slender, while those from Guangxi are more robust.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-HcMZfS2ugdeTCUcd2K3c5urTnzy\"\u003eAll regional forms belong to the same species. Identification must be based solely on the three stable diagnostic characteristics:\u003c\/div\u003e\n\u003col start=\"1\" class=\"list-number1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-BZEhfDoUsdfKKIcmc6Icj6HVnch\" data-list=\"number\"\u003e\n\u003cdiv\u003eIn males, the 3rd and 4th spines of the first dorsal fin are elongated into filaments;\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-FbdKfMwhTdKsfncZnJKc1rlFn1e\" data-list=\"number\"\u003e\n\u003cdiv\u003eThe cheek bears a distinct labyrinthine reddish-brown pattern;\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-WLPtftTRUdABmqc65bgcsID3nYd\" data-list=\"number\"\u003e\n\u003cdiv\u003eThe branchiostegal membrane has small red spots or patches.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-UmrxfkxZOd2sLgcPo6icUTfensb\"\u003eAny individual expressing all three traits can be reliably identified as *Rhinogobius filamentosus*. Regional variations are adaptive phenotypic differences and do not represent distinct species.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-TZ4HfSrbrdXRXrcV4PdcC0NKncc\"\u003eV. Husbandry Guidelines\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-GTGpfFrv9d8DtVcLep3chb1XnMh\"\u003e(1) Water Parameters and Temperature\u003c\/h3\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-ToTzfQ2MHdmpnbcYyGycwSFmnnb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTemperature\u003c\/strong\u003e: Maintain 18–25 °C year‑round. Use cooling fans or chillers in summer to avoid exceeding 30 °C. No heating is required in winter if temperatures remain above 10 °C; insulation is recommended below 10 °C.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-NFbjf2xlndbo1GcPAjHcsIrfn4c\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eWater Quality: Maintain clean, well‑oxygenated water with dissolved oxygen ≥ 6 mg\/L. Use hang‑on‑back or canister filtration. Perform weekly water changes of 30%, using water aged for at least 24 hours, with a temperature difference ≤ 2 °C. Keep pH stable at 6.5–7.5 and avoid drastic parameter shifts.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-AZCnfHLGrdPzUKckCd5cGUq3nab\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSubstrate: Use neutral river sand or stream gravel (2–5 mm diameter), layered 3–5 cm thick to mimic natural conditions and support natural foraging behavior.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-Lh2kfYbSudOgVicUetAc0ICSnSc\"\u003e(2) Diet and Feeding\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-ZbX1fOOGwdPTjHcAYGtczedgnch\"\u003eThis species is carnivorous. In the wild, it consumes aquatic insect larvae, cladocerans, ostracods, and small crustaceans. In captivity, it can be trained to accept frozen bloodworms, frozen brine shrimp, minced shrimp meat, and high‑protein pelleted diets (with gradual acclimation).\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-JGhrfMeeid2CAPcUeF8cMD6cnXh\"\u003eFeed 1–2 times daily, offering only what can be consumed within 5 minutes to avoid water pollution. A fasting day once per week is recommended to aid digestion and prevent intestinal issues.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-VWusfZyZQdF26ycLKeHcjeknnBc\"\u003eAvoid high‑fat foods. Regular supplementation with live foods such as baby brine shrimp improves overall condition and coloration.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-TpSnfWYM9d1IhvcFf61cgkwPnAc\"\u003eVI. Aquarium Setup and Aquascaping\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-HzvCfVvoRd5RfbcYfn4cTEjbnrh\"\u003e(1) Tank Size\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-ZZIBfdPsJdYbdRca2hWcqL2Snsg\"\u003eA minimum tank length of 40 cm is recommended. Larger tanks provide more stable water conditions, greater swimming space, and allow for more complex, naturalistic aquascaping. Stocking density can be adjusted flexibly according to tank volume, provided that sufficient shelter and caves are provided.\u003c\/div\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-L40Tfxk1RdCFHncsw1scfV7Ynbf\"\u003e(2) Aquascaping Layout\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-DjdtfbB6gd0hP1clrKrc76HAnCc\"\u003eCore Principle: Mimic shallow stream environments, emphasizing shelter and territorial separation through rockwork, caves, and vegetation, balancing biological needs with aesthetic appeal.\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-IYphflkcJdtPYocuu1rcMBnlnah\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eHardscape: Use natural stream rocks or Qinglong stone to create numerous independent caves (3–5 cm diameter), with a total number of at least 1.5 times the total number of fish. Distribute caves evenly to reduce competitive interactions.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-DQKWfRmIxdbXMocNxPYcwaaqn8g\" data-list=\"bullet\"\u003e\n\u003cdiv\u003ePlants: Include native aquatic plants such as mosses, *Anubias*, *Vallisneria*, and *Egeria*. Plant in crevices or along tank margins to provide cover and assist with water purification.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-DHqvfJ2M5d0Sq1cJvF5c1tf9nlh\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eWater Flow: Create moderate water flow parallel to the substrate using a wavemaker, simulating natural stream conditions to enhance oxygenation and encourage natural activity levels.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-DLIGfVeV4dU2SLc5IH8cfZTTnOe\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eLighting: Provide 8–10 hours of neutral lighting (6500K) daily. Avoid intense direct light. Driftwood may be added to enhance visual structure and support biofilm growth.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-Us3OfVEHKd0krFcqJkbc2KAuncb\"\u003eVII. Tank Mates and Community Keeping\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-VA3Kfcyv7dM5cVctXAwcOB6xnlY\"\u003e(1) Suitable Tank Mates\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-M7zifr0T3dqmVWc6XgEcUh7tnQg\"\u003eChoose peaceful, similarly sized species from overlapping native habitats:\u003c\/div\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-WqU5fCzKLdKphHcjeuncW2Wcn3d\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSmall hillstream loaches (e.g., *Metahomaloptera* spp.)\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-WCGbfA9PbdXNagcM7xWcRxhkn5g\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSmall native cyprinids such as minnows and bitterlings\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-PpAufxjEgdaXUIc48ozcxc8nnNz\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSmall freshwater shrimp (for cleanup purposes, with caution)\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-JrqxfJpmfdVuXlci4XVcfcYEnOc\"\u003e(2) Unsuitable Tank Mates\u003c\/h3\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-OyKEfZdald97SOcaoOQctEwpnXJ\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eAggressive or highly territorial fish: bettas, large cichlids, large predatory gobies\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-WkZhfpInidMKWpc9xa7czcPDn0d\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eVery small, active schooling fish that may persistently harass gobies or risk predation\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-OzXgfVhTxda4sucvBGHcHfIunOR\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eLarge sucker‑mouth catfish (e.g., common plecos), which may attach to and injure gobies\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-UGGDf0if0dJUq2cilI0cmVtqnHe\"\u003e(3) Stocking Density\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-D7dXf0szDd8kYzczhIxc3NP9njf\"\u003eDensity should be adjusted according to tank size and the availability of hiding spaces. In a 60 cm tank, a group of *Rhinogobius filamentosus* can be kept alongside 3–4 small loaches, provided ample caves are present. Larger tanks (80–100 cm) can support greater numbers, with territorial separation maintained through structured aquascaping.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-N9FDfJUfddkR4hcfwAScG61Jn23\"\u003eVIII. Breeding Behavior\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-ZCXOfiol2dPgdGcVbU1cTLcPnXd\"\u003e(1) Breeding Conditions\u003c\/h3\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-YqaKf7eD3dn4aiccrgxc6HtAnSd\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSelect healthy, well‑colored adults with intact fin filaments (males) and plump abdomens (females). A recommended ratio is 1 male to 2 females.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-VQd2fwPTrdVv7ucJJ9ocK6jPnnb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eBreeding tank: ~50 cm length, temperature 22–24 °C, pH 6.8–7.2, soft to slightly hard water (5–10 °dGH).\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-V4SRfxcqgdOUwZcUTRAcnk44nkb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eProvide spawning sites: ceramic caves or tubes (approx. 5 cm diameter), positioned with openings facing the tank wall. Use a thin sand layer and reduce flow rate.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-B2v1fMUHNdbIzqcliJLcRaOmnPd\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eNatural spawning season: April to June, as water temperatures rise. Spawning can be induced in captivity by gradual temperature adjustment.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-R0owfyscSdJeuPce4tUcA9YNntf\"\u003e(2) Courtship and Spawning\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-A2HSfbSa6ddIOIcz45DceuYAnBg\"\u003eDuring breeding, males occupy and defend caves, displaying extended fins to attract females. Upon acceptance, the pair enters the cave, and eggs are deposited and fertilized on the inner walls.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-L1Laf8Jr2dUgTqcthsScV5IMncf\"\u003eEggs are adhesive, spherical, pale yellow, 1–1.5 mm in diameter. Clutch size ranges from 50 to 200 eggs. Incubation lasts approximately 7–10 days, depending on temperature.\u003c\/div\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-IWrtfW1AsdilCKcxv0KcFhvqnbf\"\u003e(3) Hatching and Fry Rearing\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-Tbc4f3cYudAsPbcYQCpce2EYnug\"\u003eMales exhibit intensive paternal care, guarding eggs and fanning them with fins to maintain oxygenation. Females may be removed after spawning.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-VW9kfgCIXd1s3lcmtzMcxPmonoc\"\u003eKeep conditions stable and avoid disturbance during incubation. The male ceases guarding and leaves the cave 3–4 days after hatching.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-PzJaf6GiwdQbxoct30Fc6N0Vn4b\"\u003eNewly hatched larvae are very small and require appropriately sized foods. Initial foods include infusoria and baby brine shrimp, offered 2–3 times daily. As fry grow, gradually transition to newly hatched brine shrimp and small frozen foods. Maintain stable water quality with minimal, frequent partial water changes to minimize fry mortality.\u003c\/div\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-IXECf0fP7ddPq4cdQ8YcYFiXnPd\"\u003eIX. Health and Disease Management\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-AwkQfbim7djMe1cVlxAcHHbjn08\"\u003e(1) Common Diseases and Treatment\u003c\/h3\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-WSixfYautdgFtpcT8Kkc9EurnPe\"\u003eSaprolegniasis (Fungal Infection)\u003c\/h4\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-OsNGfAx5Hd8rqNcZdO2c24ujn0e\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eCause: Low temperature, poor water quality, or physical injury\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-WzslfbCIydUBtTcxnVOcZFZ6nMc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSigns: White cotton‑like growth on the body, lethargy, loss of appetite\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-O4mxfpzEidv0PicOtbBcVtYYngb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eTreatment: Raise temperature to 26–28 °C, perform 30% water change, treat with methylene blue (0.3 mg\/L) for 3–5 days. Isolate severely affected individuals.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-Iu4AfC0JOdHde2cGGGAcBYO0nXg\"\u003eIchthyophthiriasis (White Spot Disease)\u003c\/h4\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-UqlwfHesMdpmlvcPDHYc1A6anBf\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eCause: Sudden temperature drop, infection by *Ichthyophthirius multifiliis*\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-MED5fsAtEd4qyIcgM2GcMhfank4\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSigns: Small white spots on body and fins, flashing, respiratory distress\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-KRwXf4iL6dCHrmc4ePucr7kwnMf\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eTreatment: Gradually raise temperature to 30 °C and maintain for 3–5 days. Add aquarium salt at 0.3% to support recovery. Reduce feeding during treatment.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"heading-3 ace-line old-record-id-Jiz5fL0Wed9DAncu8R7cNxSmnGf\"\u003eEnteritis\u003c\/h4\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Lp9ff1qDVdlJx9cgVNZcrZuInVb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eCause: Overfeeding, spoiled food, or high‑fat diets\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-AYCsffUMUdcewZcka80cPoeLnlg\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eSigns: Abdominal bloating, stringy feces, loss of appetite\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-B5c6fNOw8djsLVccUEpcXIsOnGg\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eTreatment: Withhold food for 2–3 days, perform partial water changes. Medicate with oxytetracycline‑treated feed if necessary. Resume normal feeding gradually after recovery.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-TkyyfQyAMdNDJec3FD4cG4s8nLd\"\u003e(2) Preventive Measures\u003c\/h3\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-BZQmfg25hdVzbfcGScacNtBTnFc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eQuarantine all new arrivals for 3–5 days to prevent disease introduction\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-USg8fIY5sdViIoc00cOc8y57nld\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eMaintain consistent water quality and avoid abrupt parameter shifts\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-QvVnfH9czdMXYVcxyyWcEjrmnsb\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eProvide a varied, high-quality diet to support immune function\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-JX5Wf7vMed9HzNc4Uukc33D4n2d\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eAvoid overfeeding and promptly remove uneaten food\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-BIicfyxIwdD3jNcWIBpcdCUsneb\"\u003eX. Conservation Status and Species Value\u003c\/h2\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-GysTfKwOudi4xjcp1DPczjoGnfP\"\u003e(1) Conservation Status\u003c\/h3\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-CZsrfZ7iLdN5IZca6nCccWYnn73\"\u003e*Rhinogobius filamentosus* is not currently listed under national key protected wildlife regulations. However, wild populations in some regions have declined due to habitat destruction, water pollution, and overcollection.\u003c\/div\u003e\n\u003cdiv class=\"ace-line ace-line old-record-id-CdcbfDlCedyQ0DcllvZcYSsEnDe\"\u003eCaptive breeding techniques are now well‑established, and most high-quality individuals available in the trade are captive‑bred. This supports the ornamental hobby while reducing pressure on wild populations. Hobbyists are strongly encouraged to choose captive‑bred specimens and avoid wild‑caught individuals to support conservation.\u003c\/div\u003e\n\u003ch3 class=\"heading-2 ace-line old-record-id-ZXEFfqenvdyo9RcpbDRcuuVlnyf\"\u003e(2) Species Value\u003c\/h3\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-IGSlfA06Xd4NK3cW9XucPngGnge\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eOrnamental Value: Small size, distinctive patterning, and interesting behavior make it highly desirable, especially the Strawberry phenotype as a centerpiece in native biotope tanks.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-PJjAfLpSzdL39VcM5KhcFr9unGc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eEcological Value: As a benthic predator, it helps control aquatic insect larvae in natural ecosystems and assists in detritus cleanup in aquaria.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-BSBZf6B5SdGPHkcGvivcwcK5nHd\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eScientific Value: Its pronounced regional differentiation makes it a valuable model for studying intraspecific variation, local adaptation, and biogeography in freshwater fishes.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"heading-1 ace-line old-record-id-NZ4RfeS2tdC0TscWub0cQvr6nYe\"\u003eXI. Important Notes\u003c\/h2\u003e\n\u003cul start=\"1\" class=\"list-bullet1\"\u003e\n\u003cli class=\"ace-line ace-line old-record-id-Vipzf1Yb7d2Gu6cc7mmc75QTnRf\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eTerritorial behavior among males is mild but present; sufficient caves and visual barriers reduce aggression and injury.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-GXXKfunXpdBWX3cUj1xc7l9Dnee\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eColor intensity in males is enhanced by stable water conditions, regular live food, and appropriate lighting. Males display peak color during the breeding season; daily feeding of brine shrimp (rich in red pigments) encourages fin displays and open‑mouth threat displays (natural territorial “calling” behavior), greatly increasing ornamental appeal.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"ace-line ace-line old-record-id-ClJdfBu0Ld0wcjcEkwkcJw8Unzc\" data-list=\"bullet\"\u003e\n\u003cdiv\u003eAvoid collecting wild specimens. Support conservation by choosing captive‑bred individuals and comply with local aquatic resource protection regulations.\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Eira Aquatics","offers":[{"title":"Default Title","offer_id":46363038515389,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7181\/5869\/files\/3_3a138175-0a42-46cb-a5b0-52c5ea314fb6.png?v=1769792885","url":"https:\/\/eiraaquatics.com\/products\/filamented-goby-rhinogobius-filamentosus","provider":"Eira Aquatics","version":"1.0","type":"link"}