Meet The World's First Warm-Blooded Fish

Granted that most fish are cold-blooded allowing their temperature to vary on its environment, there is this large, round fish- about the size of a manhole cover - is claimed to be warm-blooded.

Deep-water fish called Opah, appears to be the first fully warm-blooded fish in the record. The first of its kind to be discovered as warm-blooded. Researchers say that the unique biology behind, Opah or known as moonfish, allow the fish to operate in peak performance even in frigid ocean depths. Most deep sea fish move slowly to ambush their prey as their low body temperature mirror the cool ocean water but the Opah have the scientists believe that there are the exception of the rule.

"Opah is the first fish that can circulate warm blood throughout the entire body that gives some advantages over tuna and sharks species" say Nick Wegner, an NOAA fisheries biologist. "Since they keep their entire bodies warm, they can stay down deep continuously close to their forage base."

Due to this discovery, it adds to a new record that Opah are different among all the fish. Opah is the world's first warm-blooded fish. Knowing researchers haven't explored the entire ocean, there are a large number of different species to be discovered and probably more species with the same kind.

source: vocativ.com