HomeFish encyclopediaRay-finned fishesClingfishesClingfishes and singleslitsPeter's clingfish Peter's clingfish (Tomicodon petersii) Scientific name: Tomicodon petersii Garman, 1875 The Peter's clingfish (Tomicodon petersii) is a marine fish of the family Gobiesocidae. Native range: Eastern Pacific, Mexico to Peru, including the Galapagos Islands. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 7-8; Anal spines: 0; Anal soft rays: 6 - 7. Elongate, blackish spots usually on sides of posterior half of body.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTomicodon petersiiFamilyGobiesocidae (Clingfishes and singleslits)OrderGobiesociformes (Clingfishes)ClassActinopterygii (Ray-finned fishes)Maximum length3.5EnvironmentMarine; demersalClimateTropicalDistributionEastern Pacific: Mexico to Peru, including the Galapagos Islands.Conservation status (IUCN)Least Concern (LC)Threat 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