Hello dear readers. Black Sea Crab Ritropanopepeus comes from the coastal sea regions in Holland.
But a little later, it spread to the coastal areas of the Azov, Caspian and Black Sea coasts. The journey of the animal did not end there, and it migrated to the lower reaches of the Don River.
The Dutch crab has a small size, the diameter of its body does not exceed 3 centimeters. Primary color terracotta or brown.
But sometimes you can find black or bluish color. The back of the animal is glossy and when exposed to sunlight it looks very impressive.
Males are somewhat larger than females and the abdomen in males is narrow and pointed. In females, the belly is wide and round.
The Black Sea Ritropanopeeus is considered an unpretentious animal that adapts to a new habitat in record time. Based on this, the crab does not need specific living conditions.
The only thing that I would recommend to you is to buy an aquarium of impressive size for crabs and plant in it a lot of aquarium plants (wallisnerias, cabombs, a hornpole, an elodea and hygrophilous). The soil should be poured with a thick layer, because the crab loves to swarm in it. The optimal substrate is coarse sand.
All the time the crab spends in search of something delicious. Ritropanopeus is famous for its peace loving character.
The only period when you can see the conflicts in these animals is the mating season, just at the time of puberty of the males. But they do not last long, and soon as the crabs mature, they will go to no. When making an aquarium for young stock, it is necessary to provide a large number of various shelters, because the crab prefers to retire and jealously guard its refuge.
Shelters are especially necessary during molting, because the new chitinous cover is very soft and the crab becomes defenseless and vulnerable.
The aquarium water should be of medium hardness, since if it is soft, it will significantly slow down the formation of the shell after molting. An active medium reaction is preferably neutral or slightly alkaline.
Already adult animals painlessly carry fresh water in aquas, in contrast to young individuals who prefer salt water. Although krabiki are not demanding of temperature, in the autumn-winter period it should be lowered to 20-22 degrees. This temperature is most consistent with natural habitat conditions.
Since the Dutch crabs react to the lack of oxygen in the water, it is very important to get a powerful aeration.
In food ritropanopeusy unpretentious. In nature, they mostly eat small worms, remains of algae and all sorts of small organisms, as well as detritus.
In aquariums, it is desirable to feed animals with live food, for example, bloodworms, small crustaceans and mollusks, a pipe maker. For a change in diet, you can sometimes give raw fish and meat, cut into small pieces.
The Black Sea Ritropanopeeus is considered to be the orderly of an aquarium, as it constantly picks up the remnants of non-eaten food and other things from the bottom.
The Dutch crab breeds in brackish sea water, because it is necessary for the formation of their offspring. The fact is that in lightly salted or fresh water, crab roe is susceptible to a fungal disease of sprolegnioz, which leads to the death of all offspring.
Upon completion of the mating process, the female withdraws. In order to get 100% of the offspring, the fertilized female is transferred to a separate container with a large number of shelters.
The process of turning eggs into small crabs is carried out through 4 stages of development.
In the first stage, the female transfers all her calf on her belly. A little later, the roe turns into small larvae, which have thorns.
They are not at all similar to adult crabs, therefore they cannot sink to the bottom. As long as they swim in the water, they will attack small crustaceans.
All four stages of development are accompanied by molting, as a result of which changes in the young will be noticeable. For example, after the first molt crabs become smooth and they have spikes disappear.
During this period of young growth, the temperature in the aquas and the parameters of the aquarium water have a great influence.
By the beginning of the 3rd stage of development, the trifle is already very similar to real crabs and begins to sink to the bottom of the aquarium. This period lasts about a month and at its end there is a molt. During the fourth stage, small fully matured crabs with a diameter of no more than 3 millimeters will appear.
At this time, it is very important that small things need to be planted in the reed, so that other inhabitants of the aquarium do not eat the younger generation of crabs.
Starter feed for crabs – finely chopped tubule and microworm. For the normal development of young Black Sea crab, in the aquarium it is necessary to regularly replace the water with fresh.
Also control the concentration of oxygen dissolved in water, as it is especially important for the life of young individuals.