HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsSnailfishesBlack snailfish Black snailfish (Careproctus atrans) Scientific name: Careproctus atrans Andriashev, 1991 The Black snailfish (Careproctus atrans) is a marine fish of the family Liparidae. Native range: Southwest Atlantic, northward of the Falkland Islands. BiologyDorsal soft rays (total): 44; Anal soft rays: 38; Vertebrae: 47. Anterior part of the body is dark brown to black; caudal region light brown; peritoneum black; stomach white. Caudal 8. Rad. Pectoral 4, rounded, without notches. Two pairs of small pleural ribs. Hypural plate divided by a cleft. Head 26.3% SL; anteanal distance 38.6% SL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCareproctus atransFamilyLiparidae (Snailfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length7.5Depth range1300 m (4265 ft)EnvironmentMarine; bathydemersal; depth range 1300 - 1300 mClimateDeep-waterDistributionSouthwest Atlantic: northward of the Falkland Islands.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