Zebrafish – Care, Types, Feeding, Tank Mates & Details

Zebrafish is a beautiful fish that is capable of decorating your aquarium. These intense, energetic fishes flocking all over the aquarium, are capable of bringing a satisfied smile on your face.

Zebrafish Description

These chordal ray-finned zebrafish belong to the family of cyprinids and are a small elegant creature with dense and shiny scales.

Zebrafish has a slender body and an elongated shape. Well decorated with specks and bright stripes, often smoothly turning into fins.

Popular varieties of zebrafish are:

  1. Leopard Danio: The body is covered with specks, similar to a scattering of leopard.
  2. Danio Rerio: One of the most common species in home aquariums. The blue longitudinal stripes are neatly alternate with a light yellow background.
  3. Flocks of pearlfish are standard on the Malaysian and Malay Peninsulas. The fins have a reddish or green tint. The elongated body is almost colorless, has a bluish color in the back.
  4. Cherry Danio: specimens are separated from the rerio. The difference is entirely transparent fins with a yellowish or red tint. Instead of stripes, you can see bright dark spots of irregular rounded shape.

Aquarium Conditions

You should choose an elongated aquarium and it is mandatory is to cover the tank with glass. You should maintain a proportion of 4 liters of water per adult. Zebrafish are schooling fish. Therefore they should be kept in 6-7 specimens.

Even though zebrafish love to frolic in algae, the central area of ​​the aquarium should remain as free as possible.  A deep layer of gravel covered with granular river sand is perfect for laying at the bottom of your aquarium. Danio prefers the sand which is dark in color.

It is essential to thoroughly clean and rinses the soil in a weak solution of potassium permanganate before placing it.

Water characteristic: Danios feel good and are actively developing in a neutral or slightly alkaline environment.

The temperature can vary from 18 to 24 degrees. Preference should be given to medium-hard water. Optimal cleansing produces

A High-performance internal filter should be used and It is required at least once a week to change 25% of the water. General cleaning can be carried out no more than once a month.

Aeration and lighting: Fish prefer well-lit aquariums with constant oxygen saturation. Especially relevant is air purging with increasing water temperature.

Zebrafish Breeding

For the production of offspring, one female and two to three males are selected, which are kept for several hours in a spawning aquarium.

As a rule, this is done in the evening. During fertilization, the female begins to spawn in the morning. The male actively pursues the female until the eggs fly out of it. Males then fertilize the eggs located under the plants.

At the end of the process, calm and tired males go on vacation, and the female noticeably loses the roundness of the abdomen.

On average, the female gives up to 200 eggs. The use of antifungal drugs will help save them in the future.

After about 48 hours, the litter matures. Larvae hatching to the light, attached to any nearby surface, and motionlessly freeze. After 5−6 days, you can notice the formation of fry feeding on ciliates.

Zebrafish Tank Mates

Best tankmates for Zebrafish is tetras, swordtail fish, mollies, catfish, and betta fish. Contact with goldfish, eels, shrimps, and cichlids should be limited.

Common Diseases

One of the essential points of keeping pets is information on the main ailments and methods of their treatment. Most often, individuals of this species encounter the following diseases:

Trihonidoz: The source of origin is ordinary ciliates. Domestic fish rub against objects and plants inside the vessel. The body is gradually covered with a gray coating in the form of flakes.

The primary measure is to increase the aeration in your aquarium. It is recommended to increase the water temperature at this time to 30−31 degrees.

Adding a minimum amount of table salt to the water has a beneficial effect. The recovery period can last from 7 to 30 days.

Plistophorosis: The first symptom is the appearance of vague white spots on the body of the fish. In the absence of therapy, spots turn into ulcers, and fins become sloppy, disheveled.

The body of zebrafish depletes its resources. The first aid measure is the complete disinfection of the aquarium and soil. Chloric lime or a five percent solution of hydrochloric acid will serve these purposes well.

During the feeding of fish, a solution of methylene blue, Trichopolum or Erythrocycline should be added according to the instructions.

Studies on Zebrafish

Zebrafish are widely used as model organisms to study the development of vertebrate creatures and the functions of their genes.

Studying on Zebrafish for scientific research was proposed by Streisinger George. After that, the importance of the model has been repeatedly confirmed by many genetic studies.

Representatives of this species have traveled to space orbit as well.

Why Zebrafish is Used for Studying?

The advantages of studying individuals over other vertebrates are:

  • High embryo development and passage from the egg stage to the larva in less than three days.
  • Healthy, hardy, transparent embryos develop outside the maternal womb, which significantly facilitates the process of manipulation and observation.

Due to the high speed and convenience of work, zebrafish can act as models for phenotypic screening of developed medicinal substances.

Some genetic engineering techniques allow the development of lines that partially imitate a variety of human diseases.

In addition to their remarkable appearance, These fishes are of great scientific interest due to their abilities for rapid genetic changes.

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