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Labyrinth fish

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Labyrinth Fish for the Aquarium – Fascinating Ornamental Fish with a Unique Respiratory System

Labyrinth fish belong to a particularly interesting group of ornamental fish in the aquarium hobby. Their defining feature is the so-called labyrinth organ, which allows them to take in atmospheric air at the water’s surface. As a result, many species are exceptionally well-adapted to bodies of water with low oxygen levels.

Many labyrinth fish originate from South and Southeast Asia, where they live in slow-moving waters, rice paddies, or densely vegetated ponds. Well-known examples of this group include betta fish, threadfin fish, and various gourami species.

Typical Characteristics of Labyrinth Fish

Many labyrinth fish kept in aquariums are distinguished by their striking colors, elegant fins, and interesting behavior. The males of many species, in particular, develop vivid colors and exhibit pronounced territorial behavior.

  • They possess a special labyrinth organ for breathing air
  • often very colorful species
  • interesting courtship and breeding behavior
  • Sometimes exhibit pronounced territorial behavior

Keeping Them in an Aquarium

Most labyrinth fish prefer calm aquariums with dense plantings and plenty of hiding spots. Floating plants are especially important, as they provide shelter for the fish while also creating ideal conditions for reproduction.

Many species thrive at temperatures between about 24 and 28 °C. Since labyrinth fish regularly take in air at the surface, the water surface should be easily accessible.

A calm environment and an aquarium with plenty of structural features contribute significantly to the well-being of these fish.

Housing with Other Aquarium Inhabitants

The compatibility of labyrinth fish depends heavily on the specific species. Many species can be successfully combined with peaceful fish.

  • Suitable for pairing with calm schooling fish such as tetras or small barbs
  • Can be kept with many peaceful catfish
  • Usually no problems with snails

Keeping them with shrimp can work, but shrimp fry may be eaten. Labyrinth fish should not be kept with crayfish or crabs, as these can injure or harass the fish.

Some species, especially betta fish, may exhibit territorial behavior toward conspecifics or other fish with similar coloring.

Popular Labyrinth Fish Species

Among the best-known and most popular labyrinth fish for aquariums are:

  • Betta (Betta splendens)
  • Dwarf gourami (Trichogaster lalius)
  • Mosaic gourami (Trichogaster leerii)
  • Honey gourami (Trichogaster chuna)
  • Grunting dwarf gourami (Trichopsis pumila)

Many of these species are very popular because of their colors and interesting behavior and—depending on the species—are also well-suited for smaller aquariums.

Buying labyrinth fish—what to look for

When buying labyrinth fish, you should pay attention to the species-specific requirements. Some species are best kept in pairs or small groups, while others are better kept alone.

A well-planted aquarium with quiet areas, floating plants, and plenty of hiding spots ensures that labyrinth fish feel comfortable and exhibit their natural behavior.