Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.
Seasonal north-south migration; at higher latitudes in summer than in winter. Males move north in the summer to feed. In fall, both sexes migrate toward the equator. In winter, typically distributed south of 40 degrees N. Females, calves, and young remain in tropical or temperate waters while older males migrate to higher latitudes in summer. Males sometimes occur as far north as the Bering Sea.