HomeFish encyclopediaRay-finned fishesPerch-like fishRoundheadsIsland longfin Island longfin (Plesiops insularis) Scientific name: Plesiops insularis Mooi & Randall, 1991 The Island longfin (Plesiops insularis) is a marine fish of the family Plesiopidae. BiologyAdults inhabit coral reef and tide pools. Benthic. Eggs are guarded by the male parent.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlesiops insularisFamilyPlesiopidae (Roundheads)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length9.8Depth range0–25 m (0–82 ft)EnvironmentMarine; reef-associated; depth range 0 - 25 m, usually 2 - 25 mClimateTemperateDistributionSouthwest Pacific: islands in the Coral and Tasman seas, including Lord Howe Island and the nearby Elizabeth and Middleton reefs, Norfolk Island, New Caledonia, and Chesterfield Bank. Western Central Pacific. Recently reported from Tonga.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