There are over 70 species of betta fish, with the most common pet varieties being the crowntail, delta, double tail, and halfmoon. Betta fish purchased from a pet store can live up to seven years ...

While Betta fish can tolerate dirty water for a short period, long exposure can cause velvet disease, a parasitic infection that makes the fish look like it’s covered in gold dust. Human ...

Betta fish are incredibly ... stark blue tail fins. Guppies are tiny, easy-care fish that grow up to 1.6 inches (4 centimeters) long. They like to live with other guppies and are social, active ...

Betta fish are known as fighting fish because they are territorial and aggressive. The small-sized fish with iridescent bodies and multi-hued tails are typically kept singly to prevent them from ...