The Betta Fish is among the most popular home aquarium pets. Its scientific name is Betta splendens and is also known as the Siamese fighting fish. The Bettas Domain is Eukarya, Kingdom is Animalia, Phylum is Chordata, Class is Actinopterygii, Order is Perciformes, and Family is Osphronemidae. The average betta is 7.5 centimeters in length. Its body shape is streamlined, allowing it to effortlessly swim through open water. The Bettas body is covered with scales that overlap each other, kind of