Scientists Discover First-ever Warm-blooded Fish

In a press release on Tuesday, NOAA Fisheries confirmed that the opah circulates heated blood throughout its body much like birds or mammals, albeit at a much lower temperature. “Fish that typically inhabit such cold depths tend to be slow and sluggish, conserving energy by ambushing prey instead of chasing it,” NOAA stated. “But the opah’s constant flapping of its fins heats its body, speeding its metabolism, movement and reaction times, scientists report today in the journal Science.”  





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