Like many other large pelagic visual predators, such as swordfish and big-eye tuna, they exhibit vertical behavior.[further explanation needed] Based on those caught off the Hawaiian coast, squid and krill make up the bulk of their diet, though they also consume small fish. Those caught along the Patagonian Shelf also showed a narrow range of prey, the most common of which was the deepwater onychotenhid squid (Moroteuthis ingens).[1]