Siamese fighting fish
The Siamese fighting fish is perhaps the most popular labyrinth fish in the aquarium trade. The paradise fish also has a long aquarium history and was one of the first aquarium fish introduced to the West. Many species of gouramies, particular the three spot gourami and the dwarf gourami, are commercially bred for the trade, and several color morphs are commonly available. Because of their capability to use atmospheric oxygen, these fish generally are not so dependent on a form of aeration in their tanks, as they can rise to the surface of the water and take a breath, or breathing apparatus. Many of the labyrinth fish are peaceful and do well in most community tanks. However, individual males, especially the Siamese fighting fish and paradise fish, are territorial towards each other. Male Siamese fighting fish cannot be kept together under any circumstances, as they have been bred for aggression and will fight to the death. In many breeding pairs, the male and female cannot be kept together for long periods of time. Males may perceive males of other species as competition if they have long and bright fins and attack them, as well. For other species of anabantoids, a large aquarium with only one male per tank is ideal to prevent aggression.