Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: Yes. At least some 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.
In the western Pacific, makes seasonal migrations between pelagic and coastal areas; summers in pelagic waters, winters apparently in East China Sea (Leatherwood and Reeves 1983).
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