Author: Smith & Radcliffe, 1912
FBname: Spined pygmy shark
Comments: An 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).