We may receive a commission on purchases made from links. There are over 70 species of betta fish, with the most common pet varieties being the crowntail, delta, double tail, and halfmoon. Betta fish ...

While not a typical home aquarium fish, some Sturgeon species like beluga and lake sturgeon are kept in large tanks or ponds. They can grow huge in size and live for more than 100 years! These fish ...