Large "warm-bodied" fish like tuna and sharks require four times more energy than cold-bodied species to survive. New research reveals a scaling mismatch where heat production outpaces heat loss as they grow, creating an "overheating predicament" that threatens these predators as oceans warm.

Large "warm-bodied" fish like tuna and sharks require four times more energy than cold-bodied species to survive. New research reveals a scaling mismatch where heat production outpaces heat loss as they grow, creating an "overheating predicament" that threatens these predators as oceans warm.