Depth range reported at 0m-2000m. A deepwater species of the outer continental and insular shelves and upper slopes. Near bottom, occasionally pelagic, adults usually below 91 m. Juveniles may be found close inshore. Found on the bottom by day, moving to the surface at night to feed, and where it may take longlines set for other species. Depth distribution related to growth and temperature, with juveniles having most shallow records and from colder, poleward regions. Feeds on a wide range of marine organisms, including other sharks, rays, chimaeras, bony fish, squids, crabs, shrimps, carrion, and even seals. Ovoviviparous, with 22 to 108 pups in a litter. Marketed fresh, frozen, or dried salted; also utilized as a source of oil and fishmeal. Not known to have attacked peo