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Actinopterygii (ray-finned fishes) > Saccopharyngiformes (Swallowers and gulpers) > Monognathidae (Onejaws)
Etymology: Monognathus: Greek, monos = one + Greek, gnathos = jaw (Ref. 45335); smithi: Named for Kenneth Smith, chief scientist for the cruise during which the material was caught.. More on author: Nielsen.

Environment / Climate / Range Ecology

Marine; bathypelagic; depth range 4201 - 5800 m (Ref. 34506). Deep-water, preferred ?

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North Pacific: Central North Pacific gyre, approximately 31°N, 159'W.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 7.2 cm TL male/unsexed; (Ref. 34506)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 75-102; Anal soft rays: 55 - 63. The available specimens of M. smithi differ from all other specimens of a similar total length (6.8-7.2) within the genus by the long skull 7.0-7.6% TL and long lower jaw 11.8-12.5% TL. Furthermore, it is distinguished by the following combination of characters: head long with elongate, pointed snout slightly upturned, rostral fang strongly hooked with distal part in a nearly right angle to dorsal profile of skull, preanal 36.0-37.5% TL, and at least 7 teeth in jaw (Ref. 34506).

The holotypes and paratypes of M. smithi were caught in the water column in a closing net at 4200 and 5200 m, with a sounding at 5800 m (Ref. 34506).

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Main reference Upload your references | References | Coordinator | Collaborators

Bertelsen, E. and J.G. Nielsen, 1987. The deep sea eel family Monognathidae (Pisces, Anguilliformes). Steenstrupia, 13(4):141-198. (Ref. 34506)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

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Internet sources

Monognathus smithi Bertelsen & Nielsen, 1987