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Overheating risk for basking sharks and fish, study finds

Researchers found mesothermic sharks and tunas burn nearly four times more energy than cold-blooded fish, leaving them more vulnerable as food supplies fall.

Summary by RTÉ
Ireland's basking sharks and other warm-bodied fish face risks from overheating due to warming oceans caused by climate change, a new study has warned.

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With increased food intake, sharks can additionally heat their bodies. This gives them speed in hunting in deeper and cooler waters. This advantage, however, is now fatal to the animals. Climate change is the fault. Researchers warn of the extinction of the animals.

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Climate change: A new study has mapped the body temperature of fish very precisely. "Humans sweat. Fish do not have that option,…

·Netherlands (Kingdom of the)
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Granada.- Large ocean fish, such as tuna or white shark, are at risk due to the impact of sea warming, mesothermic animals suffering a high energy demand to adapt to an increasingly hot water. A research paper published by Science warns that large mesothermic fish such as tunas, peregrine sharks or white sharks face a high energy demand and a growing risk of overheating due to the rise in ocean temperature.

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RTÉ broke the news in Ireland on Thursday, April 16, 2026.
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