A recent study has found that there are more warm-blooded sharks than scientists initially believed. This discovery suggests that warmer muscles might help these giant carnivores be more powerful and athletic.
While the majority of fish are cold-blooded and rely on the temperature outside of their bodies to regulate their internal temperatures, less than one percent of sharks are actually warm-blooded. The extinct but mighty megalodon and the living great white shark generate heat with their muscles the way many mammals do. However, they are not the only sharks with this warm quirk.
A study published November 7 in the journal Biology Letters found that there are more warm blooded sharks than scientists initially believed. Warmer muscles might help these giant carnivores be more powerful and athletic, by using that heat to generate more energy. Regional endothermy in fish has been seen in apex predators like the great white or giant tuna, but there has been debate on when this warm bloodedness evolved in sharks and if the megalodon was warm blooded. A previous study from June 2023 found that the megalodon was warm blooded and that the amount of energy it used to stay warm may have contributed to its extinction about 3.6 million years ago
Sharks Warm-Blooded Muscles Energy Apex Predators Megalodon
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