HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFlatheadsLong-spined flathead Long-spined flathead (Platycephalus longispinis) Scientific name: Platycephalus longispinis Macleay, 1884 The Long-spined flathead (Platycephalus longispinis) is a marine fish of the family Platycephalidae. Species factsScientific namePlatycephalus longispinisFamilyPlatycephalidae (Flatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Depth range10–75 m (33–246 ft)EnvironmentMarine; demersal; depth range 10 - 75 mClimateSubtropicalDistributionEastern Indian Ocean: endemic to Australia, from Carnarvon, Western Australia to western South Australia and Lakes Entrance, Victoria; also off Fraser Islands, Queensland.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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