Meet the world's first fully warm-blooded fish

Meet the world's first fully warm-blooded fish
(Image credit: YouTube.com/Science Magazine)

It's called an opah, and scientists in the journal Science say it maintains a warm temperature throughout its entire body by "continually flapping [its] wing-like pectoral fins," according to Newsweek.

It also looks like giant goldfish:

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Ryu Spaeth

Ryu Spaeth is deputy editor at TheWeek.com. Follow him on Twitter.