HomeFish encyclopediaRay-finned fishesPerch-like fishCombtooth blenniesKosi rockskipper Kosi rockskipper (Pereulixia kosiensis) Scientific name: Pereulixia kosiensis Regan, 1908 The Kosi rockskipper (Pereulixia kosiensis) is a marine fish of the family Blenniidae. Native range: Western Indian Ocean, Pakistan south to Durban, South Africa. BiologyDorsal spines (total): 11 - 12; Dorsal soft rays (total): 11-12; Anal spines: 2; Anal soft rays: 12 - 14. Body dusky with widely scattered, pale bordered, dark or white spots.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePereulixia kosiensisFamilyBlenniidae (Combtooth blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length20.0EnvironmentMarine; demersalClimateSubtropicalDistributionWestern Indian Ocean: Pakistan south to Durban, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=1 and Fec=100-1000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026