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BiologyAn oceanic, wide-ranging, tropical pelagic species occurring near continental and insular land masses, sometimes over the shelves, but usually over the slopes (Ref. 247). Displays vertical migrations on a diel cycle, seen at the bottom during the day and travels to 200 m at night (Ref. 247). Feeds on deepwater squid, lanternfish, gonostomatids and idiacanthids, and probably follows its prey on their diel migrations (Ref. 247). Ovoviviparous (Ref. 205). Has well-developed photophores densely covering the ventral part of the body and sparsely seen on the sides and hardly developed on the dorsal surface (Ref. 247).