Warming waters could make sharks “right-handed”—and deadlier

Rising ocean temperatures and acidification are known to be altering the way fish grow and reproduce—and now research shows these climate change side-effects may also change how fish think and act. A recent study has found Port Jackson sharks become “right-handed” when incubated at the kind of temperatures projected to prevail by the end of this century, if climate change continues at its current pace. Some scientists think such shifts could lead to behavioral changes that tip marine ecosystems out of balance.

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