Comments: Eats primarily medium to large squids, sometimes also octopus and various fishes. Large males at high latitudes also take large quantities of demersal and mesopelagic sharks, skates and fishes (Gosho et al. 1984, Jefferson et al.1993, Perry et al. 1999, Whitehead 2003). Dives deeply when foraging, some dives over 1800 m have been recorded, but most are less than 500 m (Potter and Birchler, in Wilson and Ruff 1999). Apparently feeds throughout the year. Although species population depleted by whaling, may take about 75 million metric tons of food from the ocean each year; an amount similar to that taken by all human marine fisheries (Whitehead 2003).