Define navigation bar settings. They live in the rice paddies and in their natural environment during the dry season the fish have to be able to survive in puddles created by buffalo hoof prints or even the cracks of the dried out rice paddies. The Betta is not the only fish to have this organ but its probably the most well known of all of them.
All labyrinth fish belong to the anabantids suborder.
The male of the species will build a bubble nest. The fish takes up air in its mouth, coats it with saliva, and spits the bubbles, which stick together on the surface of the water. They can be kept in a jar as small as a mayonnaise jar and as large as you would like. But only one male to a container because these fish will fight. Changing the water depends on the size of the container.