Actinopteri (ray-finned fishes) > Argentiniformes
(Marine smelts) > Bathylagidae
Etymology: Bathylagichthys: Greek, bathys = deep + Greek, lagos = hare + Greek, ichthys = fish (Ref. 45335); australis: From its occurrence in the waters of the Southern Hemisphere.
Environment: milieu / climate zone / depth range / distribution range
Marine; pelagic-oceanic; depth range 50 - 1000 m (Ref. 45488), usually - m (Ref. ). Temperate; 0°C -
Indian and Pacific.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 20.8 cm SL male/unsexed; (Ref. 41239)
Morphology | Morphometrics
soft rays: 11 - 13;
Vertebrae: 47 - 50. Branchiostegal rays 3. Supraorbital short, posterior well behind vertical through the middle of the orbit. Canals of subcutaneous vascular system of the trunk not forming anastomoses below the lateral line. Pyloric caeca 10-16 (Ref. 41239).
Mesopelagic (Ref. 75154).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kobylyanskiy, S.G., 1990. Two new species of the genus Bathylagichthys Kobyliansky [Kobilyansky] (Bathylagidae, Salmoniformes) from Southern Hemisphere subpolar waters. J. Ichthyol. 30(5):21-27. (Ref. 41239)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 1.3 - 13.7, mean 9.2 °C (based on 164 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00205 - 0.01282), b=3.00 (2.79 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (52 of 100) .