HomeFish encyclopediaRay-finned fishesPerch-like fishCombtooth blenniesStretchjaw blenny Stretchjaw blenny (Chasmodes longimaxilla) Scientific name: Chasmodes longimaxilla Williams, 1983 The Stretchjaw blenny (Chasmodes longimaxilla) is a marine fish of the family Blenniidae. Native range: Western Central Atlantic, Northern Gulf of Mexico, from Pensacola, Florida to southern Texas. BiologyMaxillary length usually greater than 15.5% SL. Usually with 11 gill rakers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChasmodes longimaxillaFamilyBlenniidae (Combtooth blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.0EnvironmentMarine; demersalClimateTropicalDistributionWestern Central Atlantic: Northern Gulf of Mexico, from Pensacola, Florida to southern Texas.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