Opah! World's first Warm-Blooded Fish Species......

[albert_dao]

Originally Posted by Scythanith

You're very correct about a few fish being "warm-blooded". The term for an animal that can vary its internal body temperature from the environmental temperature is known as Poikilotherm. It's a counter-flow blood routing through certain muscle groups, in conjunction with other tricks that raises their internal temperature above that over the surrounding waters. The big difference is poikilotherms cannot keep their internal temperatures at a steady spot like homeothermic animals, ie mammals.

And yes, cool fish

See? I can handle that. My wee itty bitty ego had no problems having that explained step by step. F-pop science writers.