Ocean Science Fact: Not all fish are cold-blooded


Did you know that not all fish are cold-blooded?

The opah, or moonfish, is the only known warm-blooded fish on Earth. Recent studies shown that the opah circulates heated blood throughout its body, giving it a competitive advantage in the cold ocean depths.  

Learn more on PCCOS here.

Source: NOAA

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Pacific Community Centre for Ocean Science (PCCOS)