Author: Nafpaktitis, 1966
Diaphus bertelseni Nafpaktitis, 1966
Status in World Register of Marine Species:
Accepted name: Diaphus bertelseni Nafpaktitis, 1966 (updated 2009-06-25)
Diagnosis: dorsal finrays 15 (rarely 14); anal finrays 15; pectoral finrays 11 (rarely 12). Gillrakers 5 (rarely 6) + 1 + 12 (rarely 11 or 13), total 18 (19, rarely 17). AO 6 (rarely 7) + 4 (rarely 3), total 10 (rarely 9). Size: to 91 mm.
Habitat: high-oceanic, mesopelagic: day at 200-300 m; night at 60-175 m. Food: no data. Reproduction: size at sexual maturity unknown; a female 91.4 mm from 'Walter Herwig' transects fully mature.
Distribution: Atlantic: broadly tropical pattern (thermophilic eurytropical subpattern), between 10° and 40° N and between 2° N and 39° S (western sector); and from off Portugal to 16° N and between 2° and 16° S (eastern sector), but with distributional gap over minimum region off Brazil. Elsewhere: Pacific Ocean from two stations in the western North Pacific and (with reservation) from off Hawaii.
Eggs, larvae and young stages. Nafpaktitis, 1968: 50, fig. 28B (juvenile).
Otoliths (sagitta). No data.