HomeFish encyclopediaRay-finned fishesPerch-like fishSleepersFinescale sleeper Finescale sleeper (Gobiomorus polylepis) Scientific name: Gobiomorus polylepis Ginsburg, 1953 The Finescale sleeper (Gobiomorus polylepis) is a freshwater fish of the family Eleotridae. In the aquarium it needs water at 25–30°C (77–86°F). Finescale sleeper care at a glanceTemperature25–30°C (77–86°F) BiologyInhabit rivers and creeks of low to moderate current velocity. A benthic piscivore.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGobiomorus polylepisFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length28.0EnvironmentMarine; freshwater; brackish; demersalClimateTropicalDistributionEastern Central Pacific: rivers near Tepic, Mexico, to the Rio Copalita near Puerto Angel in the south of Mexico, Pacific drainage. From the R?o Pozo Salado, Playa Naranjo to the R?o Jicote, near Loma, Costa Rica.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026