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Danio (Brachydanio) – types, description, content, breeding

Carp family (Cyprinidae).

Bangladesh, Burma, eastern India, Malaysia. Thailand and o.Sumatra.

Keep in standing and slowly flowing water.

The body is slender, stretched in length, flattened out laterally. 1-2 pairs of antennae.
The tail fin is two-bladed.

The fish are peaceful, gregarious, very mobile, jumping, they like light and transparent water rich in oxygen.

It can be kept in a common aquarium closed from above, in which, along with plants, there should be enough free space for swimming.

Feed: live, substitutes.

Before planting for spawning, males and females are kept 7-10 days apart and are well fed with live food. You can spawn a couple for spawning, but 2 males and 1 females or a group of fish with a predominance of males are best.

Spawning aquarium from 30 liters per pair of fish with a separator net and small-leaved plants. The water is fresh, with the same parameters as for the content, the level of 8-10 cm.

Fish are planted in the evening and the temperature is raised by 2-3 ° C.
Spawning usually occurs in the morning at sunrise or when lighting is turned on.

After spawning, the fish are removed, the net and plants are shaken off, and the eggs are removed.

The incubation period is 2-5 days, the fry swim in 3-7 days.

Starter feed: ciliates, rotifers.

Puberty in 4-6 months.

Danio is blue. Danio Thai.
Brachydanio kerri
(Smith, 1931).

They inhabit the islands in the northern part of the Gulf of Siam.

2 pairs of antennae.
The back is gray-blue with a reddish tint, the side is shiny from blue to green-blue with golden or red-golden longitudinal lines, the belly is bluish-white. The fins are yellowish or gray-green.

The male is slimmer, more intensely colored, grayish tones predominate in the female in the coloration.

Fish hold in all layers of water.

Water: 23-25 ​​° C, dH 5-15 °, pH 6.5-7.5.

Danio pearl.
Brachydanio albalineatus
(Blyth, 1860).

Inhabit Burma, Malaysia, Thailand and o.Sumatra. Kept off the quiet banks of rivers and streams.

The body is only slightly flattened laterally.
2 pairs of antennae.
The back is gray-olive, the side is gray-green, silver, and depending on the lighting it is cast in a greenish, bluish or purple color. Along the body there is a red stripe with a blue edging, which becomes weaker with age and may disappear altogether.
Dorsal fin yellowish green, anal from cherry to orange-red color, tail greenish.

The male is more intensely colored; there may be a cherry-red spot in the middle of the tail fin. The female is much fuller, especially before spawning.

Fish hold in all layers of water.

Water: 21-25 ° C, dH 5-15 °, pH 6.5-7.5.

Danio leopard.
Brachydanio rerio
(Meinken, 1963).

Many ichthyologists believe that this is a zebrafish mutation. Not found in nature.

2 pairs of antennae.
The main body color is gray-white to golden, with numerous dark spots that can form a longitudinal strip on the caudal stem.
Fins are yellowish, may be with small dark specks.

The female is colored much lighter than the male.

Fish hold in all layers of water.

Water: 18-24 ° C, dH 5-20, pH 6-7.5.

Danio rerio.
Brachydanio rerio
(Hamilton, Buchanan, 1822).

Bangladesh and the eastern part of India.

2 pairs of antennae. There is a veil form with strongly enlarged caudal, anal and pectoral fins.
The back is olive, the rest of the body is from silvery to golden color with 4 black and blue longitudinal stripes, passing on to the anal and caudal fin.

The male has a golden body, the female has a silvery one.

Fish are more likely to stay in the upper layer of water.

Water: 18-24 ° C, dH 5-20 °, pH 6-7.5.

I. Petrovitsky recommends water for dilution: 22-24 ° С, dH 10 °, КН up to 2 °, рН 7.

Crosses with danio point.

Danio point.
Brachydanio nigrofasciatus
(Day, 1869).

They inhabit Burma. Keep in the mountainous part of small rivers and ponds.

1 pair of antennae.
The back is olive-brown, the side is yellowish-white. Along the body there is a golden-brown stripe in the edging of black-and-blue stripes, passing to the caudal fin.

Under the lower band is a row of blue dots. Unpaired fins yellowish
brown, anal with blue dots and strokes.

The male is smaller, the belly is yellowish-white, in the female it is orange.

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