HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesWalton's mudskipper Walton's mudskipper (Periophthalmus waltoni) Scientific name: Periophthalmus waltoni Koumans, 1941 The Walton's mudskipper (Periophthalmus waltoni) is a brackish-water fish of the family Gobiidae. Native range: Western Indian Ocean, Persian Gulf to Pakistan. BiologyDorsal spines (total): 10 - 13; Dorsal soft rays (total): 12-13; Anal spines: 1; Anal soft rays: 10 - 11. Caudal fin asymmetrically rounded, lower rays distally thickened.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePeriophthalmus waltoniFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0EnvironmentMarine; brackish; demersalClimateTropicalDistributionWestern Indian Ocean: Persian Gulf to Pakistan.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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