Are all fish cold-blooded?

It is not exactly true that all fish are cold-blooded.

Scientists have discovered the first fully warm-blooded fish - The Washington Post

Researchers Reveal The First Warm-Blooded Fish

3,043,100+ Cold Blooded Stock Photos, Pictures & Royalty-Free Images - iStock

2+ Thousand Cold Blooded Fish Royalty-Free Images, Stock Photos & Pictures

Giant Sea Reptiles Were Warm-Blooded Killers?

Deep-sea fish found to be warm-blooded › News in Science (ABC Science)

Found: First warm-blooded fish (we've been eating it)

We all know and understand that fish are cold blooded animals. However despite this fact we as fisherman and w…

What advantages do warm-blooded fish have? •