Siamese Fighting fish is not the only Betta fish that is well liked by aquarists. The Betta genus includes greater than 50 defined species. Most of them can be kept in aquariums but it is barely a few species that are frequently kept by other aquarists than the actual Betta fanatics. One of the main generally kept Betta species aside from the Siamese Fighting fish is Betta imbellis – the Peaceful Betta. The Peaceful Betta is native to Malaysia and may reach a maximum size of 8 centimeters 3 inches. As the name suggests, it’s a docile fish in comparison to the Siamese Fighting fish and the Peaceful Betta can do well in a group aquarium with other tranquil and non competitive species.