HomeFish encyclopediaRay-finned fishesCusk eelsViviparous brotulasCoco coralbrotula Coco coralbrotula (Ogilbia cocoensis) Scientific name: Ogilbia cocoensis M?ller, Schwarzhans & Nielsen, 2005 The Coco coralbrotula (Ogilbia cocoensis) is a marine fish of the family Bythitidae. Native range: Eastern Pacific, Isla del Coco, Costa Rica. BiologyDorsal soft rays (total): 63-70; Anal soft rays: 49 - 54; Vertebrae: 40 - 41. The species is characterized by the following: vertebrae 11 + 29-30 = 40-41, dorsal fin rays 63-70, anal fin rays 49-54; outer pseudoclasper with a broad base and long supporter resulting in a sharp and pointed tip; inner pseudoclasper anteriorly inclined, of about length of outer pseudoclasper, with sharp, pointed tip anteriorly and fleshy flap posteriorly; penis with abrupt change from broad base to pointed tip; opercular spine with single, sharp tip; large scale patch on cheeks with 6-7 vertical scale rows; otolith slender, length: height ratio about 2.4; upper preopercular pore present.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOgilbia cocoensisFamilyBythitidae (Viviparous brotulas)OrderOphidiiformes (Cusk eels)ClassActinopterygii (Ray-finned fishes)Maximum length3.8Depth range0–3 m (0–10 ft)EnvironmentMarine; demersal; depth range 0 - 3 mClimateTropicalDistributionEastern Pacific: Isla del Coco, Costa Rica.Conservation status (IUCN)Vulnerable (VU) (D2)Threat 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