Most fish are ectotherms, meaning they require heat from the environment to stay toasty. The opah, as an endotherm, keeps its own temperature elevated even as it dives to chilly depths of 1,300 ...

Ectotherms such as fish, reptiles and insects can stretch their body's tolerance of high and low temperatures a little bit at each extreme, but that stretch, or plasticity, is relatively small ...

Ectotherms which live on the land, such as reptiles and insects, are at greater risk than sea-dwelling creatures such as fish and crustaceans, according to the research by the University of ...

Clearly, more must be done to prioritise their survival. Cold-blooded (ectothermic) animals such as fish and reptiles tend to keep growing throughout their life. This means older individuals are ...