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Teleostei (teleosts) > Lophiiformes (Anglerfishes) > Gigantactinidae (Whipnose anglers)
Etymology: Gigantactis: Greek, 'gigas' or 'gigantos' = gigantic + Greek, 'aktis' = ray (referring to the unusually long first dorsal-fin spine that functions as a lure in this genus) (Ref. 86949); longicauda: From the Latin longus, for long, and cauda for tail, in reference to the deeply cleft caudal fin and elongate caudal fin rays (Ref. 41361).

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

Marine; bathypelagic; depth range 500 - 1200 m (Ref. 86949). Deep-water

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Western Central Atlantic.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 11.4 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 5; Anal spines: 0; Anal soft rays: 5. Metamorphosed females differ from all other Gigantactis congeners in having length of illicium 330% SL; escal bulb nearly spherical, with a short, truncated distal prolongation, pigmented distally, and bearing two pairs of short, spatulate appendages; stem of illicium without filaments (Ref. 41361); short dentary teeth (longest tooth 1.7% SL), arranged posteriorly in two longitudinal series; longest caudal fin rays 50% SL (Ref. 86949).

Known only from the holotype collected in an open midwater trawl (Ref. 41361). Maximum length based on an immature female (Ref. 41361).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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Bertelsen, E. and T.W. Pietsch, 2002. New species of deep-sea anglerfish of the genus Gigantactis (Lophiiformes: Gigantactinidae) from the western North Atlantic Ocean. Copeia 2002(4):958-961. (Ref. 41361)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 11 October 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.8 ±0.7 se; based on size and trophs of closest relatives

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

Gigantactis longicauda Bertelsen & Pietsch, 2002