Poromitra cristiceps (Gilbert, 1890)

Family:  Melamphaidae (Bigscale fishes or ridgeheads)
Max. size:  12.1 cm SL (male/unsexed)
Environment:  bathypelagic; marine; depth range 0 - 3263 m
Distribution:  North Pacific Ocean.
Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 12-13; Anal spines: 1-1; Anal soft rays: 9-9; Vertebrae: 27-29. This species is distinguished by the following characters: spined posterior and lower margins of the praeoperculum with an unspined notch in the angular part of it; insertion of ventral fins at the level of the vertical of the posterior margin of the pectoral fin insertion; upper jaw extends beyond the vertical of posterior eye margin; soft rays 12-13 in dorsal fin, 9-10 in anal fin; first branchial arch with 27-30 rakers; vertebrae 27-29; pyloric caeca 7 (Ref. 83719).
Biology:  This was caught by non-closing fishing gear in water horizons of 1000-0 to 2000-0 m (Ref. 83719).
IUCN Red List Status: Least Concern (LC); Date assessed: 30 December 2019 Ref. (130435)
Threat to humans:  harmless


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