HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesBrownboy goby Brownboy goby (Bathygobius laddi) Scientific name: Bathygobius laddi Fowler, 1931 The Brownboy goby (Bathygobius laddi) is a marine fish of the family Gobiidae. Native range: Indo-West Pacific. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 8. Males uniformly dark brown; fins dusky to black. Females light brown with crossbars on body; caudal base with dark bar; dorsal and caudal fins mottled, other fins clear.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBathygobius laddiFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentMarine; reef-associatedClimateTropicalDistributionIndo-West Pacific.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