HomeFreshwater aquarium fishOther freshwater fishBearded ghoul Bearded ghoul (Inimicus didactylus) Scientific name: Inimicus didactylus Pallas, 1769 The Bearded ghoul (Inimicus didactylus) is a brackish-water fish of the family Synanceiidae. Native range: Indo-West Pacific, Thailand to Vanuatu, north to the Ryukyu Islands and southeast China. BiologyDorsal spines (total): 15 - 17; Dorsal soft rays (total): 7-9; Anal spines: 2; Anal soft rays: 10 - 12. Body colors highly variable and best identified by the patterns on the fins. Lower 2 pectoral rays are entirely free and used as "walking" legs and the inner face of the fin is brightly colored.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameInimicus didactylusFamilySynanceiidae (Stonefishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Depth range5–80 m (16–262 ft)EnvironmentMarine; brackish; reef-associated; depth range 5 - 80 mClimateTropicalDistributionIndo-West Pacific: Thailand to Vanuatu, north to the Ryukyu Islands and southeast China.Conservation status (IUCN)Not EvaluatedThreat to humansVenomousUsesAquarium: commercial More other freshwater fishLined soleAchirus lineatusPumpkinseedLepomis gibbosusSouth American lungfishLepidosiren paradoxaShort-tailed pipefishMicrophis brachyurus brachyurusFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026