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Crayfish in a fish tank

maintenance, care, compatibility

Cancer in the aquarium is great if you are looking for an unusual, bright and interesting inhabitant. It is enough to care for them, crayfish are hardy, beautiful and unpretentious. But, at the same time, they are not suitable for the general aquarium, so you need to know how and with whom to keep it so that other inhabitants do not suffer.

When choosing a cancer in your tank, remember that there are more than 100 different species all over the world. Most of which needs cool water and only some ways to live in warm.

Florida cancer (Procambarus clarkii)

So before you buy crayfish, study well what a particular individual needs, and with good care they will live with you for 2-3 years, although some species may last longer.
In this article we will answer the most common questions about the content of crayfish in the aquarium, which in general will fit every species.

One cancer can be kept in a small aquarium. If you regularly replace the water, then enough 30-40 liters.

Crayfish hide their food, and you can often find remains in a shelter such as a cave or a pot. And given the fact that there are a lot of food residues, then in an aquarium with crayfish the balance can be very quickly disturbed and frequent water changes with a ground siphon are simply necessary.

When you clean the aquarium, be sure to check all its caches, such as pots and other hidden places.

If more than one cancer lives in an aquarium, then the minimum volume for keeping 80 liters. Crayfish are cannibals by nature, that is, they eat each other, and if during the molt one of them gets to the other, then it will not be worth it.

Because of this, it is extremely important that the aquarium was spacious and there were many different shelters in which a molded cancer could hide.
As for filtering, it is better to use an internal filter. Since the hoses that go to the outside, this is a great way to get the cancer out of the aquarium and one morning you will see it crawling around your apartment.

Remember, this is a master of escape! The aquarium should be tightly covered, since a runaway cancer can live for a short time without water.

Shooting in nature, Australia Euastacus spinifer cancer:

Orange Mexican dwarf crab Cambarellus patzcuarensis

One of the most peaceful and small crayfish, which are kept in the aquarium. Learn more about the orange dwarf Mexican crayfish here.

Australian Reddish (Red-fingered) Cancer (Cherax quadricarinatus)

In nature, crayfish mainly feed on plant food. What to feed cancer? In the aquarium, they eat sinking granules, tablets, flakes, and special foods for crayfish and shrimp.

It is also worth buying food for crayfish with a high content of calcium. Such feeds help them recover their chitinous cover faster after shedding.

Additionally, they need to be fed with vegetables – spinach, zucchini, cucumbers. If you have an aquarium with plants, you can give surplus plants.

In addition to vegetables, they eat protein and feed, but they should not be given more than once a week. This may be a piece of fish fillet or shrimp, frozen live food.

Aquarists believe that feeding crayfish with protein feed significantly increases their aggressiveness.

Feed the crayfish in the aquarium should be once a day, but when it comes to vegetables, a piece of cucumber, for example, you can leave it for the whole time until the crayfish eat it.

It is difficult to contain crayfish with fish. There are many cases when they successfully live in a common aquarium, but even more when either fish or crayfish are eaten.

Often, crayfish catch and eat very large and very expensive fish at night. Or, if the fish is large enough, it destroys the decayed cancer.

In short, the cancer content in a fish tank sooner or later end badly. Especially if you keep with slow fish or fish living at the bottom.

But even such a quick fish like guppies seems to be a leisurely crayfish having a sharp movement of claws, having a bite in half, which I witnessed.

Cherax destructor cancer migration in an Australian creek

Crayfish in a cichlid aquarium, especially large ones, do not last long. First, a horn-type cichlid cichlid tears up completely adult cancer (there is even a video in the link article), and secondly, smaller cichlids can kill them during shedding.

Cancer with shrimp as easy to guess does not get along. Even if they eat each other, it’s not a problem to devour a shrimp.

Also crayfish will dig up, tramp or eat your plants. Not all species are so destructive, but the majority. To contain crayfish in an aquarium with plants, the task is useless. They cut and eat almost any species.

The only exception is dwarf Mexican aquarium cancer, it is quite peaceful, small and does not touch the plants.

It is possible, but for a long time he does not live and definitely cannot be kept with fish and plants. Our crayfish is large and agile enough, it catches and eats fish, weeds weeds.

It does not live long, because this species is cold-water, we have warm water only in summer, and even then, it is rather cold at the bottom. And in the aquarium is warmer than he needs. If you want to contain it, try it.

But, only in a separate aquarium.

Red Florida cancer is one of the most popular crayfish kept in an aquarium. They are popular for their color, bright red and unpretentiousness.

In their homeland are very common and are considered an invasive species. As a rule, they live on the order of two to three years, or slightly longer and adapt perfectly to different conditions. Reach a body length of 12-15 cm.

Like many crayfish, Florida masters of escape and the aquarium should be tightly covered.

Marble cancer: content in the aquarium, compatibility, reproduction, photo-video review


(Marblecrayfish, Procambarussp.)

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 cancer is medium in size, reaching 10-15 cm in length. Because of their small size, most aquarists try to keep marble crayfish in small aquariums. However, they create a lot of trash and dirt and it is better to plant the marble crayfish in the aquarium as spacious as possible.

Especially if you want to contain not one or two, but more crayfish.

The minimum amount for the maintenance of marble cancer is 40 liters, and then it is quite difficult to care for such an aquarium. In different sources there are different wishes in terms of content for maintenance, but keep in mind that the larger the space, the larger and more beautiful the crayfish and the cleaner they are in the aquariums.

Better that it was an aquarium of 80-100 liters.

It is better to use sand or small gravel as a soil, it is easier for crayfish to find food on such soil and clean after it is much easier. Be sure to add a variety of different shelters – caves, plastic pipes, pots, various snags, coconuts.

Since the marble crayfish are river creatures and at the same time quite a lot of trash, it is necessary to use a powerful filter, and create a stream in the aquarium. Additionally, it is better to use aeration, as crayfish are sensitive to the oxygen content in water.

The optimum temperature is 18-28 C, pH – from 6.5 to 7.8.

Regular water changes in the aquarium are required, and you need to siphon the ground to remove rotting food residues. In this case, sand will come in handy, since the remnants do not penetrate into it, but remain on the surface.

As for plants, the only plants that can survive in an aquarium with marble crayfish are floating on the surface or in the water column. Everything else will be trimmed and eaten.

You can try to put Javanese moss, they eat it less often, but still eat.

The aquarium should be carefully closed, especially if you use an external filter. Crayfish are very dexterous and easily run away in tubes from the aquarium, and then they die from drying out.

All cancers periodically molt. Before shedding a marble crab, for a day or two, he does not eat anything and hide. If suddenly you saw shell in the aquarium, do not throw it away and do not get scared!

Cancer will eat it, there is a lot of calcium in it. After molting, the cancer is very vulnerable and it is necessary that there are plenty of shelters in the aquarium where it can sit out.

Homeland dwarf aquarium crayfish – Mexico and the banks of the Mississippi River in the United States, which is why their other name – dwarf crayfish. They belong to the family Cambarellus, having in its composition several genera.

Underwater pets get along well with small peace-loving fish, preferring the middle and upper layers of water. Do not tolerate the presence next to a shrimp. To the dwarf cancer was comfortable, he needed:

  • an aquarium with a volume of 25 liters, filled with clean, oxygen-enriched water with a temperature of 17 to 21 ° C;
  • the aqueous medium is not too soft (pH 8-9), so as not to harm the formation of cancer shell;
  • lighting is better scattered.

Dwarf cancer – a sedate animal, loving solitude. It is important to create for him secluded corners with an abundance of pebbles, snags, tuff pieces and tall plants.

Let us consider in more detail a few members of the Cambarellus family.

Cambarellus patzcuarensis sp. Orange are distinguished by their bright color. This species comes from the surroundings of Patzkauro, a small town in Mexico.

Its natural color is brown. Orange color he acquired as a result of experiments of Dutch breeders.

In adulthood, a representative of this species reaches from 3 to 5 cm in length, while females are always larger than males. However, claws resembling a lancet in shape are smaller in females.

Dwarf orange cancer lives about 20 months, reaches adulthood by 5 months.

Acceptable water temperature for it is from 15 to 28 ° C.

Tangerine pets are not recommended to be kept together with other representatives of crustaceans.

Differently spotted eubliphar, stream cancer or Cambarellus montezumae. He also hails from Mexico.

In the color there are different shades of brown, dark brown spots close to black. Adults reach 6 cm in length.

Mexican cancer is a non-conflicting neighbor and is suitable for sharing with the fish. He eats them only dead.

At the same time, Mexican cancer is not inclined to damage algae, prefers thick vegetation.

During the molting period, he needs a shelter with a diameter of at least 2 cm.

It is quite satisfied with water with a temperature of 15 to 30 ° C.

Or Cambarellus puer. Arrived on our mainland from the shores of a distant Mississippi.

The color of the crustacean can be different: from gray to reddish-brown, with characteristic wavy or dotted lines along the back.

In the middle of the tail is usually located a dark speck. Adult dwarf puerh cancer is only 4 cm long.

This species requires the presence of a special soil in the aquarium, saturated with oak or almond leaves, alder cones and pebbles. The female buries in them and so hides while carrying and feeding offspring.

Water for swamp cancer is suitable at room temperature from 20 to 23 ° C.

A few words I would like to say about this crustacean – Cambarellus texanus. This is the erroneous name of the marble crab Marblecrayfish / Procambarussp, which does not belong to the dwarf family, but is also a favorite pet of aquarists.

The pattern on his armor resembles the stains on marble, the color has shades from black and brown to greenish.

Adult marble crayfish reach 15 cm in length.

Creations are unpretentious in leaving. Water suitable for them should have a temperature of 18 to 27 ° C.

The nature of dwarf crayfish allows an ordinary aquarium lover to get aesthetic pleasure from their content and breeding. Small representatives of crustaceans will please the household and guests, they will become a real pride of their owners.

The main thing is to pay enough attention to the care of these amazing pets and their reproduction.

Briefly about the content of invertebrates and other animals in the aquarium

The content of crayfish in an aquarium creates many problems (and here we talked about the most popular crayfish in the aquarium). They will hunt any fish that dare to swim close.

And believe me, with their external sluggishness, they can be very fast! Often, inexperienced aquarists plant crayfish in a common aquarium and then wonder where the fish go … In addition, they actively dig up the aquarium to suit their design needs and at the same time cut the plants.

Suffer from their attacks and even fellow shrimp.

The best thing is to keep the crayfish in a separate aquarium, because they can really be very beautiful. But also dangerous for other residents.

If you want to have cancer, then the Mexican orange dwarf cancer will be the most accommodating and beautiful.

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