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. There ...

With flashy colors, iridescent scales, and long fins that flow around them like underwater ball gowns, betta fish are some of the most eye-catching creatures you might see for sale at a pet store or ...