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Teleostei (teleosts) > Argentiniformes (Marine smelts) > Opisthoproctidae (Barreleyes or spookfishes)
Etymology: Opisthoproctus: Greek, opisthe = behind + Greek,proktos = anus (Ref. 45335).
More on author: Vaillant.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathypelagic; depth range 300 - 800 m (Ref. 6542), usually 500 - 700 m (Ref. 6542). Deep-water; 51°N -

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Circumglobal in tropical to temperate waters. Eastern Atlantic: western Ireland to Mauritania and from Sierra Leone to Angola (Ref. 6542). South China Sea (Ref.74511)

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 1 - ? cm
Max length : 10.5 cm SL male/unsexed; (Ref. 6542)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 11 - 13; Anal spines: 0. Sides of body dark; head below and behind eye sprinkled with large melanophores; snout translucent ventrally, transparent dorsally (Ref. 6597). Anal fin either with 2-3 rudimentary rays or not visible externally (Ref. 6597).

Mesopelagic (Ref. 58302). Probably not exhibiting vertical migration (Ref. 6686). The limits of its distribution coincide with the 400m-isotherm for 8°C (Ref. 6542).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

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. 130435)

Least Concern (LC) ; Date assessed: 10 August 2012

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO - Publication: search | FishSource |

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Internet sources

Estimates based on models

Preferred temperature (Ref. 123201): 1.5 - 5.7, mean 3.1 °C (based on 89 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.02188 (0.00844 - 0.05670), b=2.98 (2.75 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.1 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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