Most bony fishes are ectothermic, or cold-blooded, but this species, much like the related tunas, is endothermic and is able to raise its body temperature to achieve a degree of thermoregulation.
The majority of bony fish are cold-blooded, but this particular species has a unique ability to regulate its body temperature, much like the tuna species that share this trait, allowing it to maintain a stable internal environment.