Labyrinth fish (suborder Anabantoidei) are a unique group of fish renowned for their ability to breathe atmospheric oxygen. This is made possible by a specialized organ known as the labyrinth organ, which functions similarly to a lung. In the wild, this adaptation allows them to survive in oxygen-depleted ponds, rice paddies, and slow-moving rivers across Africa and Southeast Asia.
This group includes some of the most iconic aquarium species, such as Gouramis, Betta fish, and Paradise fish. A common trait among many labyrinth fish is their intriguing breeding behavior; most species are bubble-nest builders, where the male constructs and fiercely guards a nest made of air bubbles at the surface.
In a home aquarium, it is vital that these fish have easy access to the water surface. Furthermore, the air temperature above the water should be kept close to the water temperature to prevent respiratory issues. They generally thrive in well-planted tanks with plenty of floating vegetation, which provides cover and ideal nesting sites.
