Gray whales migrate from Arctic waters full of food to the lagoons of Baja Mexico—but as the climate crisis gathers pace, they have been sighted foraging in unexpected places. Recently, some have begun to explore the dangerously busy waters of San Francisco Bay. Scientists at the Marine Mammal Center and the California Academy of Sciences investigating an unexpectedly high death toll among gray whales have found that almost 20% of individuals seen entering the Bay died there, in large part due to boat strikes. The team’s study appears in Frontiers in Marine Science.
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