HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsVelvetfishesRare velvetfish Rare velvetfish (Matsubarichthys inusitatus) Scientific name: Matsubarichthys inusitatus Poss & Johnson, 1991 The Rare velvetfish (Matsubarichthys inusitatus) is a marine fish of the family Aploactinidae. Native range: Western Pacific, known only from the holotype taken in Queensland, Australia. BiologyDorsal spines (total): 6; Dorsal soft rays (total): 6; Anal spines: 2; Anal soft rays: 4; Vertebrae: 21. Head extremely large, depressed. Body elongate, not compressed. Caudal fin damaged (rounded, without branched rays, 10 segmented rays and 4 unsegmented). Body scales absent, except for lateral line which are extremely long and tubular; first 3 touching each other. Its distinct, densely melanic spots on the head may be a transitory larval or juvenile character but cannot be verified until larger specimens are caught.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMatsubarichthys inusitatusFamilyAploactinidae (Velvetfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length1.7EnvironmentMarine; demersalClimateTropicalDistributionWestern Pacific: known only from the holotype taken in Queensland, 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