HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFlatheadsSpotfin flathead Spotfin flathead (Grammoplites suppositus) Scientific name: Grammoplites suppositus Troschel, 1840 The Spotfin flathead (Grammoplites suppositus) is a marine fish of the family Platycephalidae. Native range: Western Indian Ocean. Species factsScientific nameGrammoplites suppositusFamilyPlatycephalidae (Flatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length20.0Depth range30–94 m (98–308 ft)EnvironmentMarine; demersal; depth range 30 - 94 m, usually 45 - 94 mClimateSubtropicalDistributionWestern Indian Ocean.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