"The opah, or moonfish, is actually quite fast, and can run with the big boys like tuna and swordfish. That's just one of many surprising revelations coming to light as more of these mysterious fish appear unexpectedly in scientific surveys along the southern California coast. Photographer captures stunning opah images. Ralph Pace dives in with camera after rare catch (and release) off SoCal."
The Opah Is The First Warm-Blooded Fish Ever Found 05/14/2015 05:42 pm ET | Updated May 19, 2015 A new study published in the journal Science has identified the world's first fully warm-blooded fish: the car tire-sized opah, or moonfish.