Actinopterygii (ray-finned fishes) > Osmeriformes
(Smelts) > Opisthoproctidae
(Barreleyes or spookfishes)
Etymology: Bathylychnops: Greek, bathys = deep + Greek, lychnos = lamp + Greek, ops = appearance (Ref. 45335). More on author: Cohen.
Environment: milieu / climate zone / depth range / distribution range
Marine; pelagic-oceanic; oceanodromous (Ref. 51243); depth range 400 - 800 m (Ref. 96339). Subtropical; 55°N - 35°N, 140°E - 120°W
Eastern Atlantic: off Azores Island. Northeast Pacific: British Columbia, Canada (Ref. 11980) to central California (Ref. 35626). Northwest Pacific: Kashimanada Sea, Japan (Ref. 559).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 58.0 cm SL male/unsexed; (Ref. 96339)
Morphology | Morphometrics
Oceanic. Eggs and larvae are pelagic (Ref. 6885). Oviparous (Ref. 35626). Bathypelagic at about 400-800 m (Ref. 96339). Minimum depth from Ref. 58018.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Quéro, J.-C., 1990. Opisthroproctidae. p. 241-243. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 6542)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 3.8 - 5.3, mean 4.7 (based on 13 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.1 ±0.1 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): High to very high vulnerability (66 of 100) .