Actinopterygii (ray-finned fishes) > Ophidiiformes
(Cusk eels) > Ophidiidae
(Cusk-eels) > Neobythitinae
Etymology: Bassozetus: Latin, bassus = thick, fat + Greek, ketos = marine mosnter, whale (Ref. 45335). More on authors: Smith & Radcliffe.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 1035 - 4420 m (Ref. 75877), usually 1069 - 1922 m (Ref. 84269). Deep-water
Circumglobal: In tropical to temperate waters.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 64.0 cm SL male/unsexed; (Ref. 84269)
soft rays: 94 - 102;
Vertebrae: 64. Snout inflated; eyes much smaller than snout; opercular spine weak or absent; preopercle without spines and posteriorly expanded almost reaching posterior margin of opercle; pseudobranchial filaments 2 (Ref. 34024).
Benthopelagic at bathyal depth (Ref. 56809). Found on the continental slope (Ref. 75154). Common species (Ref. 34024). Oviparous, with oval pelagic eggs floating in a gelatinous mass (Ref. 205). Of the 36 female specimens caught, 3 with 0.5-1.0 mm eggs. No identifiable stomach contents were found (Ref. 84269).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999. Ophidiiform fishes of the world (Order Ophidiiformes). An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date. FAO Fish. Synop. 125(18):178p. Rome: FAO. (Ref. 34024)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 2.2 - 5.4, mean 3.4 (based on 3623 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00417 (0.00163 - 0.01066), b=3.12 (2.89 - 3.35), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.7 ±0.6 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 (54 of 100) .