HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesSostra pygmy goby Sostra pygmy goby (Trimma sostra) Scientific name: Trimma sostra Winterbottom, 2004 The Sostra pygmy goby (Trimma sostra) is a marine fish of the family Gobiidae. Native range: Western Pacific, Caroline Is., Fiji, Kiribati Republic, Marshall Is., Solomon Is., and Ponape. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 8-9; Anal spines: 1; Anal soft rays: 8 - 9. Diagnosis: Seven large regular orange red bars along the side of the body; a dark spot on the lower base of the pectoral fin, and another on the lower peduncle; internal pigmentation on the dorsal surface of the head just behind eyes well-developed but broadly diffused, not forming a discreet bar. Predorsal scales absent. Second dorsal spine slightly to very elongate. A moderate interorbital and variably-developed postorbital trench. The fifth pelvic fin ray is unbranched and 50-70% of the length of the fourth.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTrimma sostraFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length2.4Depth range0–40 m (0–131 ft)EnvironmentMarine; demersal; depth range 0 - 40 mClimateTropicalDistributionWestern Pacific: Caroline Is., Fiji, Kiribati Republic, Marshall Is., Solomon Is., and Ponape.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