HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFlatheadsWelander's flathead Welander's flathead (Rogadius welanderi) Scientific name: Rogadius welanderi Schultz, 1966 The Welander's flathead (Rogadius welanderi) is a marine fish of the family Platycephalidae. Native range: Western Pacific, Moluccas, Bali, the Marshall Islands and American Samoa. BiologyDorsal spines (total): 9; Dorsal soft rays (total): 11; Anal spines: 0; Anal soft rays: 11. Preopercle with a small antrorse spine. Infraorbital and suborbital ridges bearing many fine serrations. Preocular spines 2-3. Lower side of head bicarinate. Iris lappet slightly bilobed..Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRogadius welanderiFamilyPlatycephalidae (Flatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Common length8.0Depth range6–40 m (20–131 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 6 - 40 mClimateTropicalDistributionWestern Pacific: Moluccas, Bali, the Marshall Islands and American Samoa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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