Danio fish

maintenance, care, compatibility

Danio is not uncommon for our aquariums. Silver-colored flocks of various colors attract the eye with swift movement and playful disposition. What kind of danios is preferable to purchase, how to ensure the best conditions and proper care?

This and not only will be discussed further.

In the wild, danios live in small warm waters of Sumatra Island, the Malacca Peninsula, India and Burma. The conditions in them are most favorable for danios:

  • warm, slowly flowing water;
  • abundance of algae, where you can hide and breed offspring;
  • A sufficient amount of live food, so important to them during the spawning period.

These fast swimming, oblong in shape, graceful fish have bright striped color. Their length reaches about five centimeters in captivity, only the Malabar Danio is somewhat larger.

Danio is endowed with a pair of short antennae, located at the edges of the oral opening.

Movable playful males outwardly differ little from females, except that in the latter the belly is somewhat wider, and the band on their oblong body is brighter and more expressive at the level of the head.

These inhabitants of aquariums have small fins of yellowish color, only the caudal fin, striped or spotted, is more expressively colored.

There are many varieties of zebrafish, and they all have a unique color.

These aquarium pets are unassuming in their diet. They are satisfied with completely different dry feed mixtures of not too coarse grinding. However, traditional food for them is still live food:

Therefore, a living diet for fish is preferable because it gives them all the necessary components for health and reproduction. In addition, for the playful nature of danios, it is important to self-realize in a kind of hunt for representatives of your lively diet.

As all the varieties of danios are recognizable by their habits, their way of being, their graceful body structure, they are so different in color and peculiarity of the natural design that is inherent in each of their species. However, it is the variety that makes these fish a real decoration of any aquarium.

Video about preparing spawning grounds for danio fish breeding:

Danio rerio (formerly Brachydanio rerio, and now Danio rerio) is a live, schooling fish that reaches only 6 cm in length. It is easy to distinguish it from other danios, running along the blue lines along blue lines. This is one of the very first aquarium fish, on a par with the macropod, and over the years it is still popular.

Danio rerio is very beautiful, inexpensive, and great for beginners and experienced aquarists.

These unpretentious and beautiful aquarium fish are great for beginners. They are very simply divorced and easy to feed the fry. Since this is a schooling fish, they need to be kept at least 5 in an aquarium, preferably more.

They get along with any peaceful and medium-sized fish.

The main thing is that all these species are easily accessible and can live in very different conditions without problems. They can even live without heating the water, as they withstand a rather low temperature of 18 ° C.

And yet, although they are very hardy, you should not keep them in extreme conditions. By the way, do not be surprised if you see that the flock of danios spends a lot of time at the filter, where the aquarium has the strongest current.

They just love the flow, as they live in nature in streams and rivers.

Danio rerio fish were first described by Hamilton in 1822. Homeland fish in Asia, from Pakistan to India, as well as in small quantities in Nepal, Bangladesh and Bhutan.

There are dozens of different variants of color and shape of the fins of the zebrafish aquarium fish. The most popular are voile danios, albinos, danios rerio red, pink danios, and even now artificially colored species have become popular.

These zebrafish are genetically modified, and are available in bright, fluorescent stains — pink, orange, blue, green. Although this color is very controversial, as it does not look natural, but so far the negative effects of interfering with nature are unknown, and such fish are very popular.

Danio rerio inhabits streams, canals, ponds, rivers. Their habitat depends largely on the time of year.

Adult individuals are found in large numbers in the puddles of the rainy season and in the flooded rice fields, where they feed and spawn. After the rainy season, they return to rivers and large bodies of water.

In nature, zebrafish feed on insects, seeds and zooplankton.

Great fish for a common aquarium. Gets along with related species, and with most other aquarium fish. Better contain from 5 pieces.

Such a flock will respect its hierarchy, and less prone to stress. You can keep with any small and peaceful fish. Danio rerio chase each other, but this behavior is not aggression, but a way of life in a pack.

They do not injure or kill other fish.

Zebrafish are one of the most popular aquarium fish of the carp family. Habitat are stagnant and flowing waters of Southeast Asia.

The most popular are the following types: rerio, pink, pearl, olive, orange, Malabar, leopard and Bengal. The fish are quite prolific, their reproduction occurs easily in good conditions.

These freshwater fishes were the first genetically modified aquarium representatives to receive bioluminescence genes in 2003.


Aquarium danios are considered to be small fish, although in natural conditions their sizes reach 15 cm. Aquarium species reach 8 cm. Depending on the variety, the fish may have a variety of colors.

They can be a simple silver color and various bright colors like neon yellow, red and green. Pink danios is distinguished by the presence of a dark red spot on the tail.

And the verio have fins, the edges of which are colored yellow.

Their body is elongated arrow-shaped and flattened at the sides. Some species may have antennae.

Danio males are much smaller than females. Danios have good health and are resistant to diseases.

Fish have a fairly wide list of neighbors with whom they have good compatibility.

Aquarium danio fish are completely unpretentious in care and their maintenance at home is subject to even the most inexperienced beginners. The aquarium will fit from 50 liters of elongated shape, which is important to keep with the lid closed so that the fish do not jump out.

School danios love to swim in a group, so you need at least 6 of them.

For a soil base is better to take small stones and gravel. Plants can choose any, but not plant them too much space, as the fish need space and good lighting. The same applies to the decor of the aquarium, which should be laid out at the edges.

It is undesirable to plant floating plants, as danios used to stick in the upper layers of water. It is necessary to take into account the correct compatibility of the fish with other inhabitants of the aquarium, so that there is no competition in the occupation of a personal area or layer of water.

The most appropriate water parameters will be the following: the temperature regime should be changed depending on the season, in the summer of 20-25 ° C, in the winter of 17-21 ° C. Acidity 6-7.5, hardness not more than 10 °.

It is important to regularly replace a quarter of the volume of water and high-quality aeration with filtration. It is possible to improve the content of danios by means of a pump-filter, thanks to which the fish will feel the flow of water as in natural conditions.

Fish danios live up to a maximum of 6 years.

Danio is quite peaceful and conflict-free fish, well neighboring with other inhabitants of the aquarium. Aquarium zebrafish have good compatibility with small fish such as neon, macropoods, rasbor, guppies and gurs.

Keeping fish is also possible with cardinals, ternation, nanostomus.

Poor danio compatibility with large or aggressive fish such as cichlids and goldfish.

The type of rerio is also called “ladies stocking” or “brachidanio rerio”. The fish is a model organism used to study the functions of genes. Rherio reaches up to 7 cm, has a silvery shade with blue stripes.

In females, the abdomen is fuller. Rherio have a variety of breeding forms, among which are with veil fins, leopard color and fluorescent transgenic.

The type of rerio has an advantage over other species by the speed of development; the fish is formed from an egg to a larva in just 3 days.

Aquarium danios have a lot of advantages due to their character, beauty and ease of care. Compatibility with a large number of other fish and fruitful breeding attract more attention and interest.

Danio pink content dilution photo description compatibility.

Some call this beautiful fish and another name danio pearl. Indeed, with bright about

Her body shimmers like nacre.

Like all typical carp representatives, the danio pink body is flattened laterally, two pairs of whiskers are located at the edges of the mouth, on the sides and on the back of the scale with a brilliant color of a complex combination of colors: blue, olive, gray, green.

The abdomen is pink in color, and in mature males it becomes saturated with bright pink.

Young fish from the sides have wedge-shaped red stripes running from the tail to the middle of the body, transparent fins with a greenish tinge and a small anal fin of red or cherry color.

Adult aquarium fish reaches 5 centimeters in length, and in nature there are specimens up to 8 centimeters.

The natural habitat of danios is quite large: from India to the countries of Indochina, where the flocks of these fish live in the cool water of small rivers and streams.

Danio is a schooling fish, and they are completely non-aggressive towards other inhabitants of the aquarium.

A flock of 7-10 fish, quickly dissecting the water space, does not harm anyone.

Active pink-pearl specimens quite peacefully coexist with such ornamental fish as

  • swordtails,
  • gourami of all kinds
  • loaches,
  • mollies and others.

But the appetite for Danio pink is excellent just because of their agility. They are happy to eat any common types of food:

  • bloodworm,
  • Daphnia
  • small insects and their larvae,
  • small plant seeds,
  • frozen mine,
  • as well as ready-made branded feed TetraMin.

True, the abuse of commercial feed should not be.

Fishes pick food well from the surface of the water, in its middle part, but they will never take food from the bottom.

How to determine gender

Females are fuller than males, and their gills have a paler coloration, especially these differences occur at a young age. Puberty occurs six to eight months after the emergence of the fry larvae into the world.


In order for the chosen female to spawn, two active males are brought to her in a separate breeding ground. To breed more offspring, group spawning can be practiced.

A fertile female is taken up to the age of one year, so that the roe is properly decanted. But in the female of pink danios, as well as in other representatives of this family, a cyst sometimes appears, which makes it barren.

But when choosing males special problems do not arise.

Fourteen days before the expected spawning date, females need to be planted from the males and fed abundantly with live food, such as the bloodworm, the strawsmith or the enkhitreya. After the due date, the female’s abdomen is rounded, which confirms the readiness to bear the calf.

For the arrangement of spawns choose an aquarium with a volume of up to 10 liters per female. At a height of two centimeters from the bottom they lay a separator grid so that it completely covers it.

If such a grid is not available, then it can be replaced by small-leaf vegetation, pressed by small pebbles to the bottom.

For fruitful reproduction, fresh distilled water is taken, of which 1/3 is boiled liquid – thus it is possible to achieve the required hardness. It is necessary to check the condition of the prepared water: pH = 7, dH = 10.
The water temperature should be the same as the temperature of the aquarium, in which the females were kept before their transfer to the breeding ground with a level of 5–8 cm above the separator net.

In the evening, put the males, a couple of hours and females. The temperature control raises t ° by 4−6 ° C and turn off the light.

The next morning spawning begins and in a few hours the female throws out about 200 eggs. After that, the “producers” are deposited back into the aquarium and clean the grid.

The incubation period for zebrafish is 1.5–2 days. After 3-4 days the fry will swim.

Initially, they are fed with infusoria, live dust, Nauplii of Artemia, which are then replaced with larger feed.

Order, family: Carp.

Comfortable water temperature: 21-25 ° C

Ph: ph 6.5–7.5, water hardness: 5-15 °.

Aggressiveness: not aggressive.

Compatibility Danio Pink: compatible with all “peaceful fish”: danios, terence, minor, tetra, scalar, soma, etc.

Useful tips: In my opinion the most beautiful fish of the kind “danok.” Look great flock, on a dark (blue) background of the aquarium film.

Fishes quick and gregarious. They can coexist with many species of fish, even with fish of medium and increased aggression: scalar, goura and even with small cichlids.

In order that the pink color of the fish was juicy, I recommend to buy specialized food (for example, Tetra-color).

Neighborhood with other fish

Danio pink is a peace-loving fish and gets on well with other breeds. You can keep with fish that have the same smooth character and small size, so that there are equal conditions of detention.
Kindred of one breed prefer to stray into small flocks of up to ten individuals and have fun. This should be considered when purchasing danio pink.




Wild Danio species breed during the rainy season when the water in the freshwater reservoir becomes warm and soft. However, females of wild specimens, caught in winter, had a belly filled with caviar. This means that the reproduction interval is influenced not only by the season, but also by abundant food.

Therefore, breeding of zebrafish and other species of fish of the Danio genus is possible at home throughout the year.

Pink danios and danios rerio become sexually mature, reaching maximum body size. When the water temperature is above 25 ° C, the rate of growth is accelerated.

At home, the fish become ready to breed at 75-80 days of life, when the length of the body of the females becomes 25 mm, and the males – 23 mm.

Ovulation of females living in the general aquarium largely depends on the effects of male hormones, which are released from gonopodium. The males pour out into the water the fraction of gonads and the testes homogenate, which contain steroid compounds of glucuronic acid.

They also cause ovulation in females.

If males are present in the aquarium for 8 hours, reproduction will begin in the morning. Females that are in isolation for 5 days will not produce eggs. Mature eggs are produced during a single spawning cycle.

With a comfortable content of heterosexuals in the tank, in any case, they will begin to multiply, and the spacing between spawns can be one week. The water temperature, which stimulates the process – 22-27 degrees Celsius.

See how to prepare an aquarium for danios.

Have you noticed that adult fish can’t spawn in a common aquarium? Pay attention to their content. The reasons for the absence of spawning may be the following factors:

  • Diseases of fish of fungal or bacterial origin;
  • The absence of males in the pond;
  • Insufficient fish getting live feeds;
  • Old age fish, or their young age;
  • Calf freezing in female’s abdomen.

Now it is necessary to understand how to distinguish between mature individuals, male and female. All types of danios (rerio, pink, malabar, pearl and others) have practical identical characteristics that determine gender. The differences between them are:

  • Females are larger than males, they have a rounded belly;
  • On the body of females, horizontal stripes are faded, as is the common color of scales;
  • During the spawning period, females are calm, slow, and males are active and playful;
  • With the advent of spawning, the color of the male body becomes brighter, the stripes become saturated with color.

How does the process of reproduction in pink danios

Danio – breeding fish in the aquarium. Reproduction of pink danios

Why do we describe this type in the article? It’s just that with the word “danios” at least 99 percent of aquarists imagine these nimble fishes, which immediately catch the eye because of their coloring.

Speaking frankly, there is no particular difficulty with this process even among beginners who brought danios for the first time. Breeding can be complicated only by the fact that these fish spawn, and are not engaged in live birth like a guppy or swordtail.

However, not everything is so terrible.

First, before breeding individuals should be divided into male and female groups that need to be transferred to separate aquariums. How to distinguish females from males? It’s simple: in females there is a noticeably more rounded abdomen, and the color of the bands on their body is more distinct.

During this period, the selected fish are fully and efficiently fed.

The masters of aquaria say that at this time the diet should include mostly chowder. It contains almost all the necessary nutrients, but it lacks fats.

This is extremely important, as the producers in no case should lose their shape before spawning. However, all zebrafish aquarium fishes, whose reproduction is considered here, have lost their shape, their spawning ability is almost always lost.

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