Actinopteri (ray-finned fishes) > Scombriformes
(Mackerels) > Trichiuridae
(Cutlassfishes) > Aphanopodinae
Etymology: Aphanopus: Greek, aphanes = hidden + Greek, pous = foot (Ref. 45335). More on author: Lowe.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; oceanodromous (Ref. 108735); depth range 200 - 2300 m (Ref. 108733), usually 700 - 1300 m (Ref. 108735). Deep-water; 71°N - 23°S, 82°W - 17°E (Ref. 6181)
North Atlantic: on both sides and at underwater rises from Denmark Strait to Cape Verde.
Length at first maturity / Size / Weight / Age
Maturity: Lm 111.6  range ? - 117.5 cm
Max length : 151 cm TL male/unsexed; (Ref. 108708); common length : 70.0 cm SL male/unsexed; (Ref. 3698); max. published weight: 0.00 g
(total): 34 - 41;
soft rays: 43 - 48;
Vertebrae: 97 - 100. Body is extremely elongated, with body depth 10.8 to 13.4 times in SL. The snout is large with strong fang-like teeth. Pelvic fins represented by a single spine in juveniles but entirely absent in adults. Color is coppery black with iridescent tint. The inside of the mouth and gill cavities black.
Juveniles mesopelagic (Ref. 6181). Bathypelagic (Ref. 58426). Migrate to midwater at night and feed on crustaceans, cephalopods and fishes (mostly macrourids, morids and alepocephalids). Mature at 80 to 85 cm. Eggs and larvae are pelagic (Ref. 6768). Data from study reveal mature individuals undertake horizontal migration to spawning and nursery grounds located off the Madeira and Canary islands (Ref. 108708). Commercial catch up to 1000 t was caught off Madeira with a specialized commercial deep water longline (Ref. 6255). Appear as bycatch in the trawl fishery west of the British Isles, along the Middle-Atlantic Ridge and at Corner Rise. Important and fabled food fish in Madeira (Ref. 4537). Some specimens reach 145 cm (Nuno Marques, Nomad@netmadeira.com, 12/09).
Displays determinate fecundity (Ref. 108695). Mature individuals undertake horizontal migration to spawning and nursery grounds (Ref. 108708). Suspended pre-spawning stages occurred in some areas of the Northeast Atlantic caused by atresia in ovaries (Ref. 108708).
Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p. (Ref. 6181)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: highly commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 1.1 - 12.6, mean 7.1 °C (based on 244 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00046 (0.00033 - 0.00063), b=3.15 (3.06 - 3.24), in cm total length, based on LWR estimates for this species (Ref. 93245
Trophic level (Ref. 69278
): 4.5 ±0.77 se; based on food items.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (K=0.11-0.25, tmax=14).
Prior r = 0.22, 95% CL = 0.12 - 0.41, Based on 3 stock assessments.
Vulnerability (Ref. 59153
): High vulnerability (64 of 100) .