Nansenia longicauda
Nansenia longicauda Kawaguchi & Butler, 1984


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Family:  Microstomatidae (Pencil smelts)
Max. size:  13.3 cm SL (male/unsexed)
Environment:  bathypelagic; marine; depth range 400 - 1100 m
Distribution:  Pacific and Atlantic.
Diagnosis:  Dorsal soft rays (total): 10-11; Anal soft rays: 9-11; Vertebrae: 47-50. Branchiostegal rays 4. Slender caudal peduncle with the least depth of which is 4.3-5.6 % SL. Longer snout of 2.3-4.1 % SL (Ref. 5123).
Biology:  Mesopelagic (Ref. 58302).
IUCN Red List Status: Data deficient (DD); Date assessed: 10 July 2014 Ref. (130435)
Threat to humans:  harmless


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