Teleostei (teleosts) >
Argentiniformes (Marine smelts) >
Microstomatidae (Pencil smelts)
Etymology: longicauda: Named for its long and slender tail.
Eponymy: Fridtjof Nansen (1861–1930) was a Norwegian explorer, scientist, diplomat and later recipient of the Nobel Peace Prize. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; depth range 400 - 1100 m (Ref. 58302). Deep-water
Pacific and Atlantic.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 13.3 cm SL male/unsexed; (Ref. 5123)
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).
Body shape (shape guide): elongated; Cross section: oval.
Mesopelagic (Ref. 58302).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kawaguchi, K. and J.L. Butler, 1984. Fishes of the genus Nansenia (Microsomatidae) with descriptions of seven new species. Los Angeles County Mus. Contr. Sci. 352:1-22. (Ref. 5123)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
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