Actinopteri (ray-finned fishes) > Argentiniformes
(Marine smelts) > Bathylagidae
Etymology: Melanolagus: Greek, melan, -anos = black + Greek, lagos = hare (Ref. 45335). More on author: Borodin.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 100 - 1700 m (Ref. 96339). Deep-water; 71°N - 58°S, 180°W - 180°E
Atlantic, Indian and Pacific: widely distributed in tropical and subtropical waters. Eastern Pacific: California Current region (Ref. 35604).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 20.0 cm SL male/unsexed; (Ref. 4459)
soft rays: 18 - 23;
Vertebrae: 48 - 54. More than two eyes; anal fin base longer than caudal peduncle; swim bladder absent; branchiostegal rays, two on each side; pectoral fins originating close to ventral surface of the body. Head and body black when fresh; scale pocket markings jet black (Ref. 13608). Branchiostegal rays: 2 (Ref. 35604). Also Ref. 41299.
Mesopelagic, perhaps with diel migration (Ref. 58302). Usually caught singly, but also in small aggregations (Ref. 6345). Feed on plankton (Ref. 6345). Oviparous, with planktonic eggs and larvae (Ref. 35604). Minimum depth from Ref. 58018.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Cohen, D.M., 1984. Bathylagidae. p. 392-394. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the north-eastern Atlantic and the Mediterranean, Volume 1. Unesco, Paris. (Ref. 6345)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 3.2 - 13.8, mean 8.2 °C (based on 1243 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00525 (0.00208 - 0.01324), b=2.98 (2.76 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.45 se; based on food items.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (50 of 100) .