In the past, many scientists believed that only mammals and birds could feel or think in complex ways. Reptiles, fish, and ...

Are sharks fish? Yes, sharks are fish, and they belong to the subclass “elasmobranch.” There are six types of animals: Need a break? Play the USA TODAY Daily Crossword Puzzle.

Before squaring up for a fight, some fish check themselves out in the mirror to make sure they're big enough. This strange behavior was seen in bluestreak cleaner wrasse (Labroides dimidiatus ...

This tiny fish can recognize itself in a mirror. Is it self-aware? The cleaner wrasse joins humans, chimpanzees, dolphins, and a select few other animals that can pass a long-standing intelligence ...

The Alaska Department of Fish and Game said two animals died during or shortly after the raid, which comes amid a years-long ...

Aquaculture refers to the farming of aquatic organisms, including finfish, crustaceans, mollusks, plants, and algae for human use. It has been practiced by cultures around the globe for millennia.

Sensory features on the armored exoskeletons of ancient fish may be the reason why humans have teeth that are sensitive to cold and other extremes.

State officials searched Steve Kroschel's wildlife facility last week for evidence of animal cruelty and removed almost 40 ...

Sensory features on the armored exoskeletons of ancient fish may be the reason why humans have teeth that are sensitive to cold and other extremes.