HomeFish encyclopediaRay-finned fishesPerch-like fishSlimys, slipmouths or ponyfishesLongspine ponyfish Longspine ponyfish (Leiognathus longispinis) Scientific name: Leiognathus longispinis Valenciennes, 1835 The Longspine ponyfish (Leiognathus longispinis) is a marine fish of the family Leiognathidae. BiologyFound in coastal waters. Stays near the substrate and feeds on fish, crustaceans, chaetognaths, nematodes, bivalves, and gastropods.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLeiognathus longispinisFamilyLeiognathidae (Slimys, slipmouths or ponyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length16.0EnvironmentMarine; demersalClimateTropicalDistributionIndo-West Pacific: southern India, throughout Indo-Malayan region, northern Australia, New Guinea and the Philippines, reports from Fiji. Further study is required to determine if the population spanning this wide range comprise one single species.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, 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