HomeFish encyclopediaRay-finned fishesSmeltsTubeshouldersBigeye searsid Bigeye searsid (Holtbyrnia macrops) Scientific name: Holtbyrnia macrops Maul, 1957 The Bigeye searsid (Holtbyrnia macrops) is a marine fish of the family Platytroctidae. Native range: Eastern Atlantic, Denmark Strait, southern Iceland and Bay of Biscay to South Africa. BiologyBathypelagic to benthopelagic in the northern parts of range, occurring from 300-1,000 m in the daytime, but as shallow as 100-120 m at night.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHoltbyrnia macropsFamilyPlatytroctidae (Tubeshoulders)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range100–1000 m (328–3281 ft)EnvironmentMarine; benthopelagic; depth range 100 - 1000 mClimateDeep-waterDistributionEastern Atlantic: Denmark Strait, southern Iceland and Bay of Biscay to South Africa.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