Having colorful pet fish in your aquarium will add a bit of a tropical flair and lift your mood, here are 5 really colorful pet fish species.

Deep-sea dragon fish may not see the light of the sun, but their vision has evolved rapidly. Some turned from blue-seeing to red, and then reverted back to blue, a new study suggests, and ...

"Enjoy putting on your professional-grade putting green, fishing in your private pond stocked with bass and bluegill, and ...

What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages: Malay ...

The blue dragon may be too weak to resist the ocean's current, but it can take on a Portuguese man o'war and even steal its venom.

A new species of critically endangered betta fish, or fighting fish, was discovered in a single peat swamp in Jambi, Sumatra, next to an oil palm plantation.

Scientists found that the fish were gradually domesticated like dog breeds into the beautiful shapes and colors that turn up today in pet stores.

Angkatavanich studied the traits of Siamese fighting fish, also known by the apt scientific name Betta splendens, and how to care for them responsibly. (Betta fish are often mistreated.

A woman makes a startling discovery when she and a friend went dumpster diving: a box full of live Betta fish from PetSmart.