A new study has found that some of the ocean's most powerful predators are running hotter than expected, and the consequences could be severe. These animals already require large amounts of energy to survive, and now they face a growing challenge as ocean temperatures rise and food becomes less available. Scientists describe this as a "double jeopardy," where both environmental stress and biological demands are working against them. The research, led by scientists at Trinity College Dublin in partnership with the University of Pretoria's (UP) Faculty of Veterinary Science, shows that certain warm-bodied fish such as tunas and some sharks, including the Great White and the basking shark, use nearly four times more energy than cold-blooded fish of similar size. As ocean temperatures climb, these species are more likely to overheat, which could shrink their habitable range and push them toward cooler regions closer to the poles.…