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 ...

Betta fish, also known as Siamese fighting fish, are often considered low-maintenance pets, which makes them an attractive ...

Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports. Native to southeast Asia, this species is known for its range of vibrant hues.

To keep your betta fish healthy, change your aquarium filter regularly. Make sure your tank is big enough to hold at least ...