HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsVelvetfishesLongfin velvetfish Longfin velvetfish (Pseudopataecus taenianotus) Scientific name: Pseudopataecus taenianotus Johnson, 2004 The Longfin velvetfish (Pseudopataecus taenianotus) is a marine fish of the family Aploactinidae. Native range: Southwestern Pacific, Australia. BiologyDorsal spines (total): 13 - 15; Dorsal soft rays (total): 14-15; Anal spines: 1; Anal soft rays: 11 - 13. This species is distinguished by having the following characters: Dorsal fin XIII-XV, 14-15; anal fin I, 11-13; pectoral fin II; pelvic fin I, 3; all fin rays unbranched. Dorsal fin high, with membrane not or only slightly incised, anterior portion distinctly raised, originating on cranium almost one eye diameter before anterior margin of eye. Pelvic fins long and slender, reaching about two-thirds distance to anus. Head and body highly compressed, body width 6.4-6.9 in SL; frontal bone with non-prominent laterally-bowed ridges, a shallow fleshy depression in their interspace; fleshy cirri densely arranged on margin and ventral surface of mandible; anterior tip of isthmus tree; modified scales densely arranged on head and body; bands of minute villi form teeth in jaws and on vomer; no teeth on palatines; vertebrae 30.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudopataecus taenianotusFamilyAploactinidae (Velvetfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length10.8Depth range20–40 m (66–131 ft)EnvironmentMarine; benthopelagic; depth range 20 - 40 mClimateSubtropicalDistributionSouthwestern Pacific: Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026