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Rainbow shark male or female
It is not possible to determine is rainbow shark male or female. The color of the young rainbow shark is less contrasting than that of adults, their body is not black, but dark gray and behind the head a black dot is visible.
The dorsal fin is edged with white. As long as their behavior does not begin to show territoriality and their color does not change into an adult color, they keep a herd. Rainbow shark reaches sexual maturity in 1-1.5 years.
Determining the sex of adult fish is also quite difficult. Females of rainbow shark are larger and slightly paler than males.
Probably in adult males the unpaired fins grow a little longer than in females, but this is all relative. Unlike men, adult women have a fuller belly. In some females, the caudal fin may have a brick color, while in the male it is bright red.
Good rainbow shark guide:
Representatives of the genus live in reservoirs in Africa, South and Southeast Asia. In the wild, fish reach more than a meter in length and are objects of fishing.
Among aquarium lovers, two types of rainbow shark are particularly popular-bicolored and green.
The red-tailed black shark lives in the waters of the Menam river in Thailand. The fish was brought to us in 1959. Under aquarium conditions, it reaches 12 cm. The body is characteristic of the entire genus-elongated, oval. The color of the body and fins is black, the tail fin is bright red.
Rainbow shark is quickly moving, briefly hidden in shelters – between rocks, thickets, protection from hooks. This fish is a typical herbivore. It constantly feels the leaves of plants and objects in the aquarium with its antennas. The horny layer on the thick lips allows to scratch plant growths of hooks, rocks, aquarium walls, and plants. At the same time, fish can move upside down with their bellies.
In the diet of rainbow shark boiled lettuce and spinach leaves should be introduced (the proportion of vegetable food should be at least half of the total volume). When it lacks plant food, it eats Daphnia, Cyclops, and does not refuse to eat Sludge worm. They eat sludge worm reluctantly, only in the absence of other food.
It is hard to tell that rainbow shark male or female because sexual characteristics are not clearly expressed. The male is slimmer than the female and the belly of the female is slightly swollen. There are constant battles between men of the same species. To other types of rainbow shark indifferent.
The breeding of fish of this genus is a problem. The female often chases the male around the aquarium and chases him mercilessly. It is difficult to choose a good male to spawn, which complicates the already difficult task of breeding rainbow shark. The producers are grown in aquariums of elongated shape and observe a balanced diet. It is desirable to maintain the water composition at any time with the above-mentioned biological filter.
It is very hard to distinguish rainbow shark male or female but the main problem in breeding all fish species of the genus rainbow shark is the selection of a male to spawn. Therefore, a hormonal stimulation is used for the breeding of a red-tailed rainbow shark and a green rainbow shark. There are cases of fish spawning even in a common aquarium. Good results are achieved by a suspension of the pituitary of cyprinid fish with the addition of the gonadotropic hormone chorionic, as well as Mitomycinum. The injection of hormone preparations takes place in the same way as Pangio catfish: in the back muscles just below the dorsal fin. Dosage-15 mcg / g fish weight.
In the spawning area, filtration through a biofilter should take place, the water temperature is 27°C, pH=6.7 and the hardness is 7-8°. After spawning, the Breeders are deposited, the egg remains are decanted by the female. The claim that rainbow fish can produce thousands of eggs seems unlikely. In the aquariums of experienced aquarists, the yield did not exceed 150-200 eggs.
The eggs are laid in an incubator, where they soon swell and swim in the water. After one day, larvae hatch from it. At this point, the water flow in the incubator is reduced to a minimum so as not to damage the delicate shell of eggs and emerging larvae. After four days, the larvae will fry. Fry is very small and it is difficult to provide them with food, and they are reluctant to eat artificial food from the company” Tetra”.
If there is no food of the required size at the time of occurrence of roasts, you can use the following method tested in practice. Freshly caught viviparous Daphnia are kept in the water of the reservoir where they lived for three days. Water should be poorly ventilated only to the extent necessary to prevent the suffocation of crustaceans. When the fry is hatched, Daphnia is caught and let into the secluded, air-cleaned water. Within 15 minutes Young Daphnia is born. They are filtered through a sieve of adult crustaceans and fed to rainbow shark fry.
This method has one advantage: young Daphnia is practically sterile, which cannot be said about the” living dust ” in a natural reservoir.
Aquarium for rainbow shark
The capacity of this aquarium is at least 80 liters. The whole backplane part is planted with Thai Fern, Echinodorus intermedius, Aponogeton elongatus. These plants can be planted in pots and have the soil cleaned of gravel. In addition, it is necessary to build caves from stones or three or four caves-shelters for fish. Some of them have a continuous entrance and exit. The passage area should be such that the fish can be turned inside. The diameter of caves or shafts is 5 cm. This is sufficient if the shelter has a continuous output. In addition to these plants, it makes sense to put waterbirds on the water. In the future, it is necessary to monitor the growth of this plant, so that most light still falls on plants that grow in the soil.
The lighting is weak but sufficient for the development of plants. The degree of illumination can be adjusted not only by weeding floating plants but also by an external lighting control.
The water temperature is 24-25°C. The Substitution should be done no more than twice a month-1/4 of the lower layers aquarium water for water prepared with the above technology.