Acanthonus armatus Günther, 1878
Bony-eared assfish
Acanthonus armatus
photo by Günther, A.C.L.G.

Family:  Ophidiidae (Cusk-eels), subfamily: Neobythitinae
Max. size:  37.5 cm SL (male/unsexed)
Environment:  bathypelagic; depth range 1171 - 4415 m
Distribution:  In deep waters off tropical and subtropical areas of all oceans. Especially abundant in the tropical western Atlantic (Ref. 3686). Reported from Carlsberg Ridge (6°22'N 60°12'E) and New Guinea (Ref. 33390). Known from Gulf of Mexico, Caribbean Sea, southern India, Philippines, Gulf of Panama and tropical west Africa (Ref. 44076).
Diagnosis:  Head large and body tapering. Snout with prominent, bifid spine. Opercular spine long and slender extending well beyond rear margin of head. Well developed spines at lower angle of preopercle. Eye small. Anterior gill arch with 16-22 developed rakers. Precaudal vertebrae 9-10.
Biology:  Benthopelagic at bathyal and abyssal depths (Ref. 56809). Common species (Ref. 34024). Oviparous, with oval pelagic eggs floating in a gelatinous mass (Ref. 205). Noted as having the smallest relative brain size among teleosts, and remarkably large semicircular canals (Ref. 7463).
IUCN Red List Status: Least Concern (LC); Date assessed: 08 July 2014 Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Torres, Armi G. - 05.03.94
Modified by: Capuli, Estelita Emily - 23.10.09
Checked by: Garilao, Cristina V. - 29.09.00

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