1-ton sharks may struggle for survival in waters exceeding 62.6°F, study suggests

A Science study finds mesothermic fish like great white and basking sharks burn far more energy than cold-blooded species and may be pushed into cooler waters as oceans warm.

Researchers estimate large sharks could start struggling above 17°C, when overheating threatens their hunting and survival.

If these top predators lose habitat or hunting efficiency, marine food webs and ecosystem balance could shift as warming continues.