marais - Discover fishes living in these biotopes

It is equipped with gills and respiratory organs, so it can breathe underwater or on the surface. In breeding season, it built a nest with viscous bubbles that shelters the eggs. It easily breeds in captivity and there are several farmed species.

It is not an eel, it owes its name to the shape of it body. It is a nocturnal species and during the day it hides in the sand. It is threatened because of overfishing. In captivity, it must be introduced in a large aquarium where there are no small fish.

During breeding, the male digs a hole in the sand. A female will deposit it eggs that it will shelter in its mouth. After hatching, the young remain close to the adults. In case of danger, they take refuge in the mouths of their parents. It is bred in pisciculture.

It can breathe oxygen from the air, it stays at least half an hour under the surface between two breathes. Its tapered pectoral fins have a tactile and sensory role. Because of its large size, it is not recommended for the aquarium of a specimen.

The male is much smaller and more colorful than the female. It is an ovoviviparous species, the male fertilizes it partner through its anal fin which forms a kind of gutter. It is the most popular aquarium fish, there are many varieties.

The female is larger than the male. Fertilization is internal and it is an ovoviviparous species. After a "gestation" of 28 days, the female "gives birth" to a variable number of juveniles: between 20 and 150. There are many varieties of color, the most common is black.

The stripes of it body allow it to hide. Parents lay their eggs in the vegetation, and provide for their offspring long parental care (custody, ventilation ...). Very popular among aquarists: there are many color varieties obtained through breeding.