Alionematichthys riukiuensis (Aoyagi, 1954)

Bigeye cusk

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Ophidiiformes \| Bythitidae \| Brosmophycinae
Synonyms	Dinematichthys riukiuensis, Dinematichthys megasoma, ... more
Common names	Robust cusk, 大身双线鼬鳚, 琉球双线鼬鳚, ... more

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Image of Alionematichthys riukiuensis (Bigeye cusk)

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Main reference

Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins. 1999. (Ref. 34024)
Other references | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 7.9 cm SL male/unsexed; (Ref. 13278)

Environment

Reef-associated; marine; depth range 0 - 3 m (Ref. 13278)

Climate / Range

Tropical

Western Pacific: Ryukyu Islands, Fiji and eastern Australia. More recently reported from Ouvéa Atoll, Loyalty Islands (Ref. 13236).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 77 - 92; Anal soft rays: 59 - 72; Vertebrae: 41 - 44. This species is distinguished by the following characters: D 77-92; A 59-72; moderately large eyes (2.5-3.0% SL); moderately slender, massive body, snout with many cirri; cheeks with scales and a large scale patch on opercular spine(6-17), with large specimens having a few scales below opercular spine; with upper preopercular pore; outer pseudoclasper broad-based, not very large, not extending beyond hood in resting position; the inner pseudoclasper is not much smaller than the outer one, equal anterior and posterior lobes, anterior lobe broadly connected to anterior rim of outer pseudoclasper; slender otolith, its length to height 2.2-2.4, with gently curved dorsal rim; otolith length to sulcus length 1.6-1.7, ostium length to cauda length 3.5-4.0; vertebrae 11-12 + 30-32 = 41-44 (Ref. 81230).

Uncommon species (Ref. 34024), inhabiting coral reefs (Ref. 13278).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

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More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Low, minimum population doubling time 4.5 - 14 years (Assuming Fec < 100)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (15 of 100)	Not marketed/unknown

Entered by Garilao, Cristina V.

Modified by Capuli, Estelita Emily

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