Researchers have discovered the first fish that warms its body much like mammals and birds. Has this bottom-dwelling anomaly been hiding in its deep, cold water home, evading scientists for years? Not ...

Have you discovered opah yet? It’s among the most versatile of fish, suitable for any manner of cooking, flavorful yet mild whether grilled, pan-fried, seared, poached or stir-fried. You can serve it ...

Joe Ludlow’s catch of a 181-pound opah might earn him a world record. The fish’s weight exceeds the current record by 18 pounds. Three anglers recently completed a rare and perhaps unprecedented feat ...

SEASIDE, Oregon -- A large colorful fish washed ashore on the Oregon coast last week in what aquarium officials called a rare occurrence. The 100-pound (45 kilogram) opah fish, also known as a ...

The fish buyer noticed something different about the large, colorful, disc-shaped opah waiting to be sold at the auction house in Honolulu. Among the differences: One fish had a bigger eye than the ...

The rare discovery Wednesday of a 100-pound opah on an Oregon beach will offer students a chance to dissect the brilliantly colored fish. The moon-shaped opah, far north of the typical range for the ...

Anglers on a tuna-fishing trip out of San Diego are surprised to find an opah school in their midst; three of the large moon-shaped fish are landed Anglers aboard the San Diego-based Excel have spent ...

The opah, or moonfish, is kind of like the Rudolph of the fish world. It's not at all like the other reindeer -- um, I mean fish -- but its unique quality makes it incredibly cool. Well, make that ...

In a first for marine biology, the large, photogenic opah fish has been found to have a big secret: it’s the only fish known to be warm blooded and capable of heating its entire body. Until now, it ...

Cold fins, warm heart? Strange but true, scientists say. In a discovery that defies conventional biology, a big fish that lives deep in the Pacific Ocean has been found to be warm blooded, like humans ...

Opah-- the large, round and brilliant orange fish in the gallery below -- are a tough catch as they don't often travel in schools, and are typically found only in tropical areas with warm water. Post ...

Researchers say they've discovered the first known fully warm-blooded fish. It's called the opah, or moonfish, and it lives in cold environments deep below the ocean's surface. Scientists say the opah ...