HomeMarine aquarium fishOther marine fishRed Irish lord Red Irish lord (Hemilepidotus hemilepidotus) Scientific name: Hemilepidotus hemilepidotus Tilesius, 1811 The Red Irish lord (Hemilepidotus hemilepidotus) is a marine fish of the family Cottidae. Native range: North Pacific, Kamchatka, Russia and along the Commander and Aleutian Islands to St. Paul Island in the Bering Sea and to Monterey Bay, California, USA. BiologyDorsal spines (total): 10 - 12; Dorsal soft rays (total): 18-20; Anal spines: 0; Anal soft rays: 13 - 16; Vertebrae: 35. Dorsal with moderate notches in the spinous part after the third spine, and between the spinous and rayed parts; caudal bluntly rounded; pelvic fins larger in males. Color variable, predominately red, sometimes brilliant red, with brown, white, and black mottling and spotting all over; there are four irregular dark saddles across back; the caudal fin with darker rays, sometimes with vertical light bars; some large males with darkly spotted pelvic fins (including base of pectorals).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHemilepidotus hemilepidotusFamilyCottidae (Sculpins)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length51.0Depth range0–450 m (0–1476 ft)EnvironmentMarine; demersal; depth range 0 - 450 mClimateTemperateDistributionNorth Pacific: Kamchatka, Russia and along the Commander and Aleutian Islands to St. Paul Island in the Bering Sea and to Monterey Bay, California, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercial; gamefish: yes; aquarium: public aquariumsResilienceVery Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.) More other marine fishBuffalo sculpinEnophrys bisonSpotfin sculpinIcelinus tenuisLongfin sculpinJordania zonopeSailfin sculpinNautichthys oculofasciatusTidepool sculpinOligocottus maculosusRoughback sculpinChitonotus pugetensisSee all other marine fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026