Actinopterygii (ray-finned fishes) > Myctophiformes
(Lanternfishes) > Myctophidae
(Lanternfishes) > Lampanyctinae
Etymology: Nannobrachium: Latin, nannus = small + Latin, brachium = the upper arm from the shoulder to the elbow; 1731 (Ref. 45335). More on author: Gilbert.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 772 - 3400 m (Ref. 50610). Deep-water; 66°N - 24°N, 135°E - 111°W
North Pacific: Bering Sea to the region east of Hokkaido, Japan in the western Pacific; Gulf of Alaska to off Bahia Magdalena, Baja California.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 21.0 cm TL male/unsexed; (Ref. 80637)
Morphology | Morphometrics
soft rays: 17 - 19;
Vertebrae: 36 - 38. 12-15 AO photophores; 8-9 tooth patches on the lower limb of the second gill arch; 37-40 lateral line organs (Ref. 36121). Pectoral fins with rather robust, stout rays (Ref. 36121). Rich brown to black, darkest dorsally and lighter below; dusky on fins, inner rays of pelvic fins whitish (Ref. 6885).
Epipelagic to mesopelagic (Ref. 31442); minimum depth of occurrence is 500 m upon reaching about 5 cm length (54657). Feed on euphausiids (Ref. 6885). Oviparous, with planktonic eggs and larvae (Ref. 31442).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Zahuranec, B.J., 2000. Zoogeography and systematics of the lanternfishes of the genus Nannobrachium (Myctophidae: Lampanictini). Smithson. Contrib. Zool., 607:1-69. (Ref. 36121)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Estimates based on models
Preferred temperature (Ref. 115969
): 2 - 3.1, mean 2.4 (based on 215 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00379 - 0.01100), b=3.14 (2.99 - 3.29), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.40 se; Based on food items.
Generation time: 5.5 ( na - na) years. Estimated as median LN(3)/K based on 1 growth studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate vulnerability (40 of 100) .