OMG! World's first fully warm-blooded fish discovered

This is a cool innovation by these animals that gives them a competitive edge.'There has never been anything like this seen in a fish's gills before," Wegner said.While mammals and birds typically maintain much warmer body temperatures, the opah is the first fish found to keep its whole body warmer than the environment.A few other fish such as tuna and some sharks warm certain parts of their bodies such as muscles, boosting their swimming performance.