Sharks Are Overheating as Warming Oceans Push Them to the Edge

A new study finds mesothermic fish such as sharks and tuna burn about 3.8 times more energy than similar-sized cold-blooded fish.

Larger individuals are especially at risk because warming oceans shrink their thermal safety margin and raise overheating risk.

As seas warm, these predators may be pushed into cooler waters, where they will need more food to survive and hunt.

The findings, published in Science by researchers from Trinity College Dublin and the University of Pretoria, highlight added climate pressure on shark and tuna populations.