Scientists stumped by worrisome rise in shark attacks on sea otters

The number of sea otters off the coast of California that die after being bitten but not eaten by great white sharks has grown so rapidly over 15 years that shark bites are now the greatest source of sea otter mortality, and the trend could affect the species’ survival. Climate change, shark population shifts and other factors are among the drivers scientists have considered, but they are largely stumped, as there’s no evidence a great white has ever actually eaten one of the mammals.

National Geographic News (free registration) (6/23)

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