Order: Carp-like (Cyprinodontiformes)
Family: Carp Tooth (Cyprinodontidae)
They inhabit the west coast of Africa, west from Ghana to Senegal.
Most species are kept in small rivers of rainforests and only some species are in shrouds. Large species live in water bodies that dry out during the drought period, i.e. from the onset of the rainy season to the period of drought (about 6 months) and are called seasonal or annual. The caviar laid by them in the ground passes diapause and after the rains have dawned, fry hatch from it.
The body is elongated in length, close to the pike shape, the front part is almost cylindrical and flattened laterally to the caudal stem. The dorsal and anal fins are assigned to the posterior half of the body and are located opposite each other.
Fish love shade in places, stay in the lower with the middle layers of water. Males behave towards each other quite aggressively, but in a large aquarium with a large number of fish their attention is concentrated and aggressiveness is reduced.
It is better to keep 1 male and several females in a species aquarium or in a large aquarium with other cyprinids of a similar size, and the species should occupy different layers of water.
The aquarium should have in places thickets and floating plants that provide shade and provide shelter.
Water for maintenance: 20-24ºС, dН up to 15º, pH 6-7, level up to 25 cm, a weekly change is required without changing the parameters. Some aquarists recommend adding table salt / 1.5 g / l /.
According to the methods of breeding fish can be divided into two main groups. In one, caviar develops without diapause, in the other with it. There is a group of fish, the eggs of which can develop both with diapause and without it.
Prior to spawning, females and males are kept separate for 2 weeks. Usually 1 male and 2-4 females are put to spawn.
Breeding water: 24-26ºС, dН 2-6º, pH 5.5-6.5, level 10 cm. Spawning lasts several weeks, the female tosses several eggs a day, more often in the morning.
Species of fish whose roe develops without diapause mark it among the plants to which it sticks. A spawning aquarium without soil is placed on a dark substrate and planted with small-leaved plants, comforting them with glassy sticks so that they do not float.
There are several breeding options:
- Fishes are not removed from the aquarium and wait for hatching and emergence of fry at the surface (fish, for the most part, do not touch eggs and fry), after which they are caught and transferred to a growth aquarium.
- Fishes are not removed, and the substrate with caviar is transferred to a small vessel with water at a level of 3-5 cm and the same parameters. Caviar is constantly monitored, especially the first 4-5 days, because at this time it is most often covered with a mushroom. Such and whitened unfertilized eggs are removed. The development of the embryo ends when its eyes are visible as dark spots. At this time, one should expect hatching that it is possible to stimulate watering with water of the same composition, but 2-4 ° C colder.
- Fishes remove and lower the water level by 3-5 cm and further as described above.
Roloffia Jerry: keeping and breeding fish.
They inhabit Guinea and Sierra Leone. They are kept in ponds of forests and shrouds.
The male’s body is blue to green-blue, red spots on the side merge and form a zigzag pattern. Dorsal fin with blue, anal fin with red border. On fins numerous red spots and stripes. The body of the female is brownish with a dark zigzag pattern, fins colorless to yellowish with a few dark spots.
Can be kept in a common aquarium with small fish.
Caviar is thrown onto plants or into the ground, and caviar can develop both without diapause and with it. The incubation period in water is 18-24 days, in peat 4-6 weeks.