Satellite tags attached to great white shark dorsal fins have revealed that they are highly migratory, just like salmon sharks, and migrate between Baja California and Hawaii, between Australia and South Africa and between South Africa and the Indian Ocean. The migration swimming speeds appear to be steady and the distance covered annually can exceed 12,000 miles (20,000 km). When the Baja-Hawaii white sharks arrive in the Hawaiian Islands their swimming behavior changes to shallower excursions, but the reasons for these migrations and differing behaviors remain a mystery. White sharks were noted using Alaska waters in the 1970s, but as more observations have been compiled they appear to use Alaska waters year round. It is not known how far north in the Bering Sea white sharks travel, but their travels are likely limited only by food availability; if they secure enough food they likely can use even Alaska’s coldest marine waters.
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