HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesSpotted frillgoby Spotted frillgoby (Bathygobius cyclopterus) Scientific name: Bathygobius cyclopterus Valenciennes, 1837 The Spotted frillgoby (Bathygobius cyclopterus) is a brackish-water fish of the family Gobiidae. Native range: Indo-Pacific, East Africa to Samoa and the Hawaiian Islands. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 8. Brown with irregular spots; dorsal and caudal fins with bands in females, dusky in males; often with dark brown saddle below each of the dorsal fins.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBathygobius cyclopterusFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.0Depth range20 m (66 ft)EnvironmentMarine; brackish; reef-associated; depth range ? - 20 mClimateTropicalDistributionIndo-Pacific: East Africa to Samoa and the Hawaiian 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