maintenance, care, compatibility
Aquarium Night Predators – Marble Crayfish
Marble carcass lives in a freshwater aquarium and is quite unpretentious to the conditions. The carapace of animals has divorces resembling a pattern on marble.
Each marble cancer is male and female at the same time (parthenogenesis), therefore their reproduction does not require a pair of individuals. Aquarists say that a sure sign that an animal will have offspring is a change in behavior. If the inhabitant of the aquarium began to hide in his shelter for a long time – you should wait for the addition.
The calf is attached to the abdomen, gestation lasts about 4 weeks, but the period may vary in one direction or another, depending on the degree of comfort of the future mother. New-born crustaceans are very small compared to an adult individual (10-15 cm) and can be eaten by both the parent itself and its tribesmen if there are several marble crayfish in the aquarium. Catching nimble small crusts is not an effective occupation, therefore, it is recommended that the calf be removed from the common tank.
After the first racers appeared, they wait about a day more. At one time, a healthy adult brings 50-70 pups, and not all of them appear simultaneously. After the expiry of the prescribed period, the adult cancer is returned to the site, the content of the young is continued in a separate container.
They eat such crumbs absolutely everything the same as adults, but they need to chop up more finely the food.
Marble cancer: content in the aquarium, compatibility, reproduction, photo-video review
This beautiful inhabitant of the aquarium world is an ornamental freshwater crayfish, which is characterized by its marble coloring. In addition, these arthropod inhabitants of the aquarium are same-sex – they have no males.
Motherland The marble crustacean is not known, but was first discovered by the Germans in Germany.
Growth this aquarium cancer occurs fairly quickly, after each shedding marble significantly increases in size. And ultimately reaches about 13-15 cm. In length. Further growth slows down
Color – based on the name, it is not difficult to guess that this cancer has a beautiful marble color. The overall color tone is variable: greenish, black, brown, and only a pattern on the body gives the cancer marble tones.
Juveniles of this cancer are stained weakly, they are almost transparent, becoming an adult, the cancer acquires a juicy marble color.
Marble crustacean in form no different from ordinary crayfish – has five pairs of legs, and if you consider the mustache – then even more.
Photo structure of crustaceans
Comfortable aquarium for a marble crab it is considered a “pond” with a lot of shelters (grottoes, caves, stones, snags), where the latter likes to hide in the daytime. These crayfish lead a midnight life ..
VERY IMPORTANT. So that each multi-fingered inhabitant of your aquarium has its own individual shelter.
It should be noted that the size of the aquarium does not play a special role. The main thing is a personal home for everyone.
It is also worth ensuring crayfish have access to the surface of the water, as they sometimes breathe air.
Requirements for water parameters for the maintenance of marble crayfish: a prerequisite for keeping crayfish is good aeration! Otherwise, these aquarium inhabitants are not whimsical.
Comfortable water temperature for them is from 18 to 28 degrees. Water change should be done every two weeks.
Food for crayfish: eat any bottom food, dry, live, etc. They are fed at night, due to their activity at this time.
Marble cancer compatibility with other inhabitants of the aquarium: these crayfish are friendly! However, in the neighbors are not recommended bottom fish (catfish), as well as slow fish (for example, Goldfish).
This is due to the fact that conflicts can occur between them, as a result of which the fish will be “cut”.
Molting process u is like all crustaceans. During the molting period, the crustaceans are defenseless, and therefore they do not leave the shelter for a long time. You should pay attention to the fact that it is impossible to remove the discarded shell from the aquarium because the crayfish eat it up thereby replenishing the chitin supply.
Photos of marble cancer
Very interesting reproduction of marble crayfish, the fact is, these “comrades”, or rather “citizens”, do not have males. They multiply, the so-called parthenogenesis.
Puberty marble crayfish comes after several molts, when the color of their shell becomes bright. This occurs approximately in 2-3 months of life.
There are no special conditions for reproduction. Good feeding and maintenance – this is the key to successful breeding crayfish. The female without leaving the shelter, for about a month (the period of incubation of eggs), bears her eggs, gracefully ventilating her with her paws.
After, fry are born, about 60-80 crustaceans, which can be planted after a month.
An interesting video of marble cancer
Marble aquarium cancer is a decorative representative of freshwater, not possessing the spine. The shape of it is the same as that of wild relatives, the difference lies in color and size.
Color – marble, green with a brown tint or yellow, may vary and vary with age.
Marble aquarium cancer does not need a large area for maintenance. For one specimen 5 liters of water are required.
The temperature in the aquarium should be average – about 25 degrees. It must be supported by a special heater.
Although this representative of freshwater can withstand temperature fluctuations from 28 to 18 degrees and vice versa. There must be a filter and aeration – cancers need a lot of oxygen, without which they can die. At the bottom of the aquarium need to lay sand or small pebbles.
Artificial shelters that mimic the environment are also required, such as stones, snags and so on. Plants should not be planted, since aquarium cancer with pleasure tastes green algae and can even bite through plastic grass, which is detrimental to freshwater. Water should be changed at least once every two weeks as it is polluted.
The crayfish tank should always be kept clean so as not to harm the inhabitants. Freshwater fish get along badly – at night they go hunting and can destroy their neighbors or spoil their fins.
It is possible to place large fishes on the surface of the water under the crayfish.
Aquarium dwellers eat almost everything. Crayfish can be fed with catfish mixtures so that the granules quickly settle to the bottom.
Sometimes it is necessary to give pets to eat pieces of veal or liver. Only you need to give food in small portions, so that it does not rot and does not spoil the water.
It will be useful to feed young beans, spinach, carrots or peas. Pre-vegetables need to pour boiling water. In the winter you can freeze the greens.
If a breeder wants his pets to live and multiply for a long time, then it is necessary to diversify the menu, and not to give exclusively purchased feeds.
Marble aquarium cancer has one distinctive feature – it has no gender. Rather, it combines both male and female. The first sign that replenishment is expected soon is the constant shelter of the crayfish.
Fertilization takes place there. At first they spawn on the belly, about 4 weeks. After that, small crustaceans appear, which immediately begin to jump in the ground and eat leftover food.
An adult is recommended to be transplanted to another aquarium in order to protect the offspring. Also, many representatives of the catfish can eat babies, so you should keep them separate. They feed on crustaceans all, as well as adults.
But for rapid growth it is worth more often to include fresh meat in the diet. Unfortunately, not all babies survive.
Weak crustaceans die or become prey for more powerful relatives. But with proper care and feeding, about 80% of offspring born remain.
The content of crayfish in an aquarium is calculated at approximately 15 liters per individual. The main condition for crayfish is the presence of personal space where they can hide or sit out during the molting period. Shelters can be in the form of pieces of pots, stones.
The soil should be sandy, after molting, they use grains of sand to maintain their balance.
Under natural conditions, crayfish sometimes crawl out onto the shore, since they need air, therefore access to the surface of the water must always be open. The optimum is their content in aquaterrarium.
For landscaping aquarium, it is better to use floating or stile-leaved plants such as Anubias or Echinodorus.
Cancers live in clean and hard water of 8-12 ° C at a temperature of 21-27 ° C and with neutral acidity. Aeration and filtration of water is very important. Cancers cannot live in acidic water, and hard water is necessary for their shell.
During the molting period, the cancer throws off the old shell, with age up to 2 times a year. This process is needed for growing crayfish, as the new shell becomes much larger and harder.
After dropping, the cancer takes refuge in the shelter until the formation of a new shell.
The content of crayfish in an aquarium with other fish should be carefully thought out, it is not necessary to colonize them with veil fish, which can easily lose their fins due to the claws of the cancer.
Compatibility of crayfish with bottom catfish such as catfish is very inappropriate, as they will search for food in the same area and fierce competition will appear. Therefore, it is necessary to feed crayfish at night.
Crayfish are especially dangerous for small fish during the night of their hunting, they can track down and attack sleepy aquarium fish. They will not stand on ceremony with small fish like guppies, neons that can fall asleep at the bottom of the aquarium.
Poor compatibility in crayfish with cichlids or other aggressive fish, where crayfish are the weak link.
Red florida cancer
There are many crayfish that vary in color, size and other characteristics. Among the commonly encountered aquarium types are California red-brown crayfish.
Also widespread are wide-toed and thin-necked crayfish.
Exotic species have an unusual bright color and have become very popular among aquarists. These include blue Cuban, zebra, marble species.
The most interesting representative can be called a marble look, featuring a unique feature. Marble carcinoma is same-sex, females do not need males and breed in a special way — parthenogenesis.
In addition, this representative of crayfish has a specific color, where on the general greenish-brown background a beautiful marble pattern is painted, with age it becomes only brighter and sharper.
Recently, crayfish are increasingly gaining love and interest to themselves due to their calm nature, entertaining behavior and easy care. Crayfish will noticeably change and revive the aquarium lifestyle.
Crayfish became full residents of the aquarium not so long ago. Previously, they were perceived rather as a rare exotic. These arthropods attract both beginner aquarium lovers and breeders with experience in this business.
Bright colors, large sizes, calm character, interesting behavior, simple care – these are their main advantages. In addition, crayfish are also sanitation aquarium.
As in the case of other inhabitants, before you start them, you need to familiarize yourself with the peculiarities of the content, which we will try to cover in this and the next article.
Wild owners of shell and claws are able to survive in any water bodies: fresh and salty, large and small. Freshwater crayfish are represented by several families, but the most interesting are two of them: Parastacidae and Cambaridae.
The first are inhabitants of the southern hemisphere. Madagascar, New Guinea, Australia, Tasmania, parts of South America (western and eastern coasts), Fiji are some of the places they have chosen.
From the family of parastacid crayfish from the genus Cherax are most often settled in an aquarium. They have a bright color and fairly well tolerate life in captivity.
The latter are found in the Northern Hemisphere, where they inhabit various reservoirs (from large rivers to small ponds). Crayfish of the genus Cambarellus and Paracambarus are chosen for home keeping.
All their representatives are also distinguished by the wealth of colors and serve as an indisputable decoration of the aquarium.
Orange Dwarf (Mexican Yellow) Cancer (Cambarellus patzcuarensis)
Beautiful, unpretentious, shell pattern looks like a marble surface on a black, brown or green background. The drawing in the young is pale, but darkens with age.
An interesting feature of this species is that during molting the shell comes off with claws and antennae.
Wide-fingered and fine-fingered crayfish are common in Russia. The main difference between them is in the size of claws and that the first ones dig holes, and the second ones do not. The body length of both is not more than 15 cm.
They are easy to maintain in an aquarium. It is interesting to watch them, as they are active almost around the clock.
The only drawback – do not breed in captivity.
As we can see, there are many varieties of aquarium crayfish. And if you decide to have these amazing creatures in your home pond, then you just have to choose an arthropod for the soul.
Read about compatibility, feeding, reproduction and conditions of crayfish in the next article.
In this video, students of the Ecological and Biological Center talk about their own experience of breeding Florida cancer: