HomeMarine aquarium fishGobies, blennies & dottybacksXestus sabretooth blenny Xestus sabretooth blenny (Petroscirtes xestus) Scientific name: Petroscirtes xestus Jordan & Seale, 1906 The Xestus sabretooth blenny (Petroscirtes xestus) is a marine fish of the family Blenniidae. BiologyDorsal spines (total): 10 - 11; Dorsal soft rays (total): 14-16. Has a tall dorsal fin and small tufts below the chin. Resembles P. thepassii and P. variabilis but usually has fewer total dorsal fin elements.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePetroscirtes xestusFamilyBlenniidae (Combtooth blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.0EnvironmentMarine; reef-associatedClimateTropicalDistributionIndo-Pacific: East Africa to the Line and Society Islands, north to Mariana Islands, south to the southern Great Barrier Reef; throughout Micronesia. Likely at Seychelles.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More gobies, blennies & dottybacksFire gobyNemateleotris magnificaYellow prawn-gobyCryptocentrus cinctusPersian blennyEcsenius midasYellowhead jawfishOpistognathus aurifronsFloral blennyPetroscirtes mitratusStriped poison-fang blenny mimicPetroscirtes brevicepsSee all gobies, blennies & dottybacks SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026