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BiologyPseudoceanic, found over continental shelves and slopes (Ref. 4066). Occurs between 325-475 m during the day; between 40-250 m at night (maximum abundance in 100 m depth). Mesopelagic (Ref. 5951). In the Cariaco Trench, day distribution is at 250 m and at night at 50 m due to anoxic conditions below 400 m and free hydrogen sulphide below 375 m. Fecundity is about 1,000 eggs per female (Ref. 9504).