HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsOrbicular velvetfishesPygmy coral croucher Pygmy coral croucher (Caracanthus unipinna) Scientific name: Caracanthus unipinna Gray, 1831 The Pygmy coral croucher (Caracanthus unipinna) is a marine fish of the family Caracanthidae. Native range: Indo-Pacific, East Africa to the Tuamoto Islands, north to southern Japan and the Ogasawara Islands, south to the Great Barrier Reef. BiologyDorsal spines (total): 7 - 8; Dorsal soft rays (total): 12-13; Anal spines: 2; Anal soft rays: 11 - 12. Uniformly dark species that has smaller, but longer tubercles than C. maculatus and lacks a notch in the dorsal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCaracanthus unipinnaFamilyCaracanthidae (Orbicular velvetfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentMarine; reef-associatedClimateTropicalDistributionIndo-Pacific: East Africa to the Tuamoto Islands, north to southern Japan and the Ogasawara Islands, south to the Great Barrier Reef.Conservation status (IUCN)Not EvaluatedThreat to humansVenomous SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026