Northern elephant seals try to feed by diving deep when in the water because the animals that view them as prey typically feed near the surface. Females migrate to the open ocean to feed in order to avoid predators as much as possible. (Bonner, 1990; Le Boeuf et al., 2000)
- Bonner, W. 1990. The Natural History of Seals. New York, NY: Facts On File, Inc..
- Le Boeuf, B., D. Crocker, D. Costa, S. Blackwell, P. Webb. 2000. Foraging ecology of northern elephant seals. Ecological Monographs, 70 (3): 353-382.