Do zebrafish lay eggs and how do zebrafish live?

Zebrafish are oviparous. Lay eggs.

Zebra fish, also known as bluestriped fish, flower fish, zebradanio rerio, is native to India and Bangladesh. (Explanation of the common blue zebra inside).

It is a collective name for two non-related fish groups, namely Cypriniformes, Cyprinidae, Brachydanio, and Scorpaeniformes, Scorpaenidae, and Pterois. Zebrafish Dan (B.)Rerio), is a freshwater aquarium ornamental fish, native to Asia, about 4 cm (inch) in length, with dark blue and silver longitudinal stripes, Demoiselle is a saltwater aquarium ornamental fish, fins spines are highly poisonous, and the body has colorful vertical stripes.

Some species are called lion-fish or lionfish, turkey fish.

Reproduction. It is not difficult to distinguish between male and female zebrafish: male zebrafish have a slender body, large fins, yellowish body color, brownish-yellow anal fins, and prominent stripes; The female fish has a fatter body, a lighter body color, a bluish tinge, a pale yellow anal fin, and an obvious abdominal expansion during the egg-bearing stage.

Zebrafish is an oviparous fish that enters sexual maturity at the age of 4 months, and generally reproduces well with 5-month-old fish. Water requirements for reproduction, hardness 6-8, water temperature 25-26 degrees Celsius. Like to spawn at the bottom of the aquarium, zebrafish like to eat their eggs the most, generally choose 6-month-old broodstock, in the 25 cm x 25 cm x 25 cm square tank bottom lay a layer of nylon net board, or lay some pebbles, after breeding will fall under the net board or scattered in the gap of small pebbles.

Select 2 or 3 pairs of broodstock, put them in the breeding tank at the same time, and generally take out the broodstock from dawn to about 10 a.m. the next day. The eggs are non-sticky and fall directly to the bottom of the tank, and at about 10 p.m., the eggs that have not been fertilized are white and can be sucked out with a straw. At the breeding water temperature of 24, the fertilized eggs hatch larvae after 2 to 3 days; At a water temperature of 28, the fertilized eggs hatch after 36 hours.

Females lay more than 300 eggs at a time, up to 1,000 eggs. When the water temperature is 25, the larvae of 7 to 8 days are fed, and the egg yolk gray water is fed at this time, and the small fish and insects are fed later. The breeding cycle of zebrafish is about 7 days, and it can reproduce continuously 6-7 times a year, and the spawning is high.

It is highly fertile, making it the preferred breed for beginners in tropical fish.

Female zebrafish. After pregnancy, the belly is swollen, the temper is easily irritable, and the swimming speed decreases, and the movement becomes sluggish.

Female zebrafish that are about to be produced will also have their reproductive pores protruding outward. If you see its belly turning pink, it is a sign that it is about to lay eggs. <>

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1. Sufficient oxygen: Although zebrafish have a strong ability to adapt to the environment, their requirements for the environment are not low. In particular, the amount of dissolved oxygen in water is higher than that of Pakai.

Dissolved oxygen is also affected by the size, temperature, and activity of zebrafish. Because zebrafish are so small, they may take longer to turn on the oxygen pump than larger fish to meet their needs in the water.

2. Water quality is critical: Fish farmers know that water quality is a key factor related to the life and health of fish. If the water is not changed for a long time, the feces excreted by the fish in the water and the secretions released by the body will contain a certain amount of ammonia, which will affect the water quality.

At the same time, if the fish do not finish the feed and do not clean it up in time, it is also prone to contamination. Therefore, one of the key points of zebrafish farming is to change the water in time.

Generally, for adult zebrafish, it is necessary to set a fixed amount at a regular time every day, about once or twice. If it is a small fish, it is best to mash the feed in advance to make it easier for them to digest. Sun Yi should also pay attention to observation when the fish are eating, to see if they are eating actively, and to see if there is any abnormality in their spirit.

Don't eat for too long, five minutes at most.

5. Pay attention to disease prevention: zebrafish is one of the more tenacious ornamental fish, so there are not many diseases. However, there are many factors that we cannot control, such as feeding live bait, polluted water quality and other factors that can also cause it to get sick.

Therefore, we must pay attention to these points in ordinary times, supplement nutrients, and improve their resistance.

Laying eggs in the water, generally one female and two males are placed in a tank the day before, the middle partition, placed in the dark room, the next morning, pull out the partition, lay eggs in half an hour, and generally can lay 200-400 pieces, 24 hours can form the basic organs, and transparent, and then begin to have pigment, 2 months of sexual maturity, and can be passed on.

Spawning in densely populated areas of aquatic weeds or in rocky piles, fertilized eggs that fall into hidden locations are expected to hatch into small fish.

Zebrafish eggs are spherical in shape, they are generally about millimeters in diameter, and the eggs are pale yellow, translucent or white. Eggs that have been fertilized will turn beige or transparent, and unfertilized eggs will be pure white. Keepers need to remove the eggs from the unfertilized fish to avoid water pollution.

Zebrafish are oviparous fish, and when they reproduce, the female fish first produces eggs, and then the male fish comes forward to fertilize.

Zebrafish lay eggs that are ball-shaped, and the diameter of the eggs is generally between millimeters. The colors are yellowish, white or translucent. If the eggs have been fertilized, they are usually transparent beige or translucent.

If it is an unfertilized egg, it is generally white. Breeders can tell if they are fertilized by their colour and clean the unfertilised eggs from the tank, which prevents them from contaminating the water quality of the tank if they become moldy. Zebrafish are oviparous fish, and when they reproduce, the female fish lay eggs first, and the male fish is fertilized.

Zebrafish eat their own eggs, they do not have the habit of protecting them, and when they spawn, their bodies will be weaker and they are likely to eat the eggs as food. When the zebrafish are spawning, the keeper needs to prepare a nylon net for them, so that the eggs will fall directly to the bottom of the tank and will not be eaten by the zebrafish. If nylon netting is not available, the keeper can also lay a layer of pebbles, and the zebrafish eggs are not sticky, and when they are born, the eggs will slowly fall to the bottom of the water.

After the keeper lays pebbles on the bottom of the water, the eggs fall into the crevices.