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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).
Eponymy: IOS stands for the Institute of Oceanographic Sciences, England, which supplied the type specimen of the hagfish. [...] (Ref. 128868), visit book page.

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

Marine; bathypelagic; depth range 1005 - 1360 m (Ref. 86949). Deep-water

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Eastern Atlantic.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 5.7 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. Esca with a dense cluster of 14-16 short, lanceolate appendages, each with numerous tiny spherical inclusions, emerging from a distal patch of pigment (Ref. 41361); length of illicium 247-256% SL; escal bulb without distal prolongation; escal papillae absent; proximal escal papillae absent; short dentary teeth (longest 1.1-1.4% SL), arranged posteriorly in two longitudinal series; length of caudal fin rays less than 37% SL; weakly developed skin coverage of proximal part of caudal fin; caudal fin rays free nearly to base (Ref. 86949).

Known from 3 specimens, the biggest of which is an adolescent female measuring 5.7 cm SL (Ref. 41361).

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

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Bertelsen, E., 1990. Gigantactinidae. p. 513-515. 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. 10761)

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

Least Concern (LC) ; Date assessed: 09 July 2014

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): 3.5 ±0.6 se; based on size and trophs of closest relatives

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

Gigantactis ios Bertelsen, Pietsch & Lavenberg, 1981