HomeFish encyclopediaRay-finned fishesCusk eelsViviparous brotulasYellow pigmy brotula Yellow pigmy brotula (Dinematichthys iluocoeteoides) Scientific name: Dinematichthys iluocoeteoides Bleeker, 1855 The Yellow pigmy brotula (Dinematichthys iluocoeteoides) is a marine fish of the family Bythitidae. BiologyRare species notable for its strict association with true reef environments and particularly so with outer reefs and reef cores. An indweller of deep interstices of lagoon and seaward reefs to a depth of at least 30 m. Ovoviviparous.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDinematichthys iluocoeteoidesFamilyBythitidae (Viviparous brotulas)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length12.0Depth range30 m (98 ft)EnvironmentMarine; reef-associated; depth range ? - 30 mClimateTropicalDistributionEastern Indian Ocean: although reported to occur widely in the Indo-Pacific, specimens have only been collected at the Batu Islands, off Sumatra, Indonesia. Western Indian Ocean: Gravid females have been collected from Seychelles Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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