HomeMarine aquarium fishGobies, blennies & dottybacksWhitespotted longfin Whitespotted longfin (Plesiops nigricans) Scientific name: Plesiops nigricans R?ppell, 1828 The Whitespotted longfin (Plesiops nigricans) is a marine fish of the family Plesiopidae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Western Indian Ocean, apparently restricted to the waters of Gulf of Aden and the Red Sea. Whitespotted longfin care at a glanceTemperature24–28°C (75–82°F) BiologyAdults inhabit coral reefs. they hide in holes during the day. Eggs are guarded by the male parent.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlesiops nigricansFamilyPlesiopidae (Roundheads)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length17.0Depth range5–30 m (16–98 ft)EnvironmentMarine; reef-associated; depth range 5 - 30 m, usually 5 - 30 mClimateTropicalDistributionWestern Indian Ocean: apparently restricted to the waters of Gulf of Aden and the Red Sea.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More gobies, blennies & dottybacksYellowhead jawfishOpistognathus aurifronsFire gobyNemateleotris magnificaYellow prawn-gobyCryptocentrus cinctusPersian blennyEcsenius midasDiadem dottybackPictichromis diademaOlive dottybackPseudochromis olivaceusSee all gobies, blennies & dottybacks SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026