HomeFish encyclopediaRay-finned fishesPricklefishes, Bigscales and GibberfishesBigscale fishes or ridgeheadsRidgehead Ridgehead (Melamphaes simus) Scientific name: Melamphaes simus Ebeling, 1962 The Ridgehead (Melamphaes simus) is a marine fish of the family Melamphaidae. Native range: Indo-Pacific and Atlantic, in tropical and subtropical waters. Southeast Pacific: Chile. South China Sea. BiologyAdults found mainly below 150-200 m. Larvae and juveniles primarily found in depths as shallow as 35-40 m. Oviparous, with planktonic eggs and larvae.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMelamphaes simusFamilyMelamphaidae (Bigscale fishes or ridgeheads)OrderStephanoberyciformes (Pricklefishes, Bigscales and Gibberfishes)ClassActinopterygii (Ray-finned fishes)Maximum length2.9Depth range0–800 m (0–2625 ft)EnvironmentMarine; bathypelagic; depth range 0 - 800 m, usually 150 - 200 mClimateDeep-waterDistributionIndo-Pacific and Atlantic: in tropical and subtropical waters. Southeast Pacific: Chile. South China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026