What kind of sharks can be kept in freshwater? There are several species of freshwater sharks

The only freshwater seawater that can survive sharks, which is more dangerous than great white sharks.

There are four common types.

1. Silver shark. <>

Silver shark is a small and cute small fish, but also the earliest ornamental shark raised by fish farming, it is native to Thailand and other places, because of the size of the shark so named, but silver shark is a kind of tropical fish with a very docile personality.

2. Red-tailed shark.

The origin of the red-tailed shark is also in Thailand, it is the smallest of all the ornamental sharks and the most colorful body color, their largest body is only 15 cm, don't look at their small size, the temper is not small, the sense of territory is particularly strong, the fight between the same kind is obvious, but with other species of ornamental fish can still live in peace.

3. Blue shark. <>

Blue sharks are larger than the first two, some can grow to more than 50 centimeters or even larger, and can be classified as large fish. Adult blue sharks have the domineering spirit of sharks and will devour small fish, and many people often think that they are sharks in the water.

4. Steller's shark.

Steller shark is native to Thailand, Malaysia and other countries, with fast growth, large size, miscellaneous diet, and low oxygen tolerance. Steller's sharks generally grow to about 30-40 centimeters. However, it depends on how big the fish tank is, and the bigger the fish tank, the faster it will grow.

Dog sharks are not allowed to be raised in fresh water.

Dog sharks cannot be farmed in fresh water, and need to be farmed in salty water. Dog sharks inhabit mainly coastal coral reef areas, often in the intertidal zone.

It is a small and medium-sized benthic shark. It is slow to move and often lies dormant on the seabed near the reef. Bottom-dwelling fish, shrimp, crabs, shellfish.

etc. for food. It is found in the Indian Ocean.

to the Western Pacific, from Japan to Australia.

Northern Seas. In China, it is distributed in the waters of Taiwan and the South China Sea.

How dog sharks reproduce:

Oviparous, oval shell rounded. The paired eggs are released into the benthic environment. The egg box is 11 cm 15 cm long and flat.

The embryonic fetus feeds entirely on the yolk inside the egg box until it hatches and swims freely. In captivity, it can take up to 4 months after being released from a female to hatch. After hatching, the total length of the juvenile shark is 13-17 cm.

The feeding method is as follows:

1. The fish tank for raising sharks should be larger, with a length of between 2 meters and 5 meters and a width of . Between 8 meters and 2 meters, the height of the water level. About 7 to 2 meters is appropriate.

2. Put some coral stones, coral sand, etc. at the bottom of the fish tank, and keep the water temperature at about 25 degrees.

3. Because sharks are marine animals, ordinary fresh water cannot be farmed, so some sea salt should be added to the water, and the concentration of sea salt and water is between , and the pH value is kept between the most appropriate.

4. It is most suitable to feed sharks with quick-frozen squid, you can also feed some shrimp with cut off the head, and if your tank filtration system is good, then you can directly feed some live fish.

Freshwater sharks are easier to raise.

Freshwater sharks are generally referred to as Su's round-bellied mango, which is only similar in appearance to sharks, but has no real relationship with sharks.

Their diet is more mixed, the first shot is relatively simple to feed, and the demand for oxygen is relatively low, even in a low-oxygen environment, they can live normally.

Their adaptability to the environment is also relatively strong, but the tolerance to low temperature is poor, and attention should be paid to controlling the water temperature of Quechang when breeding.

1. Water temperature: Freshwater sharks can grow in a water temperature between 20-34, but the most suitable water temperature for them to grow is 26-32, and when the water temperature is lower than 18, their activity will decrease. When the water temperature drops below 16-14, they stop eating.

When the water temperature drops to 12, you will freeze to death.

2. Feeding: Freshwater sharks have a mixed diet, and mainly eat rotifers, cladopods, copepods and other foods when they are young, and will also eat some aquatic plants. When they become adults, they will eat aquatic insects, animal carcasses, small fish, small shrimp, etc.

3. Water quality: their requirements for water quality are not very high, and it is enough to keep the water quality clean and stable.

When raising freshwater sharks, use unpolluted water quality, drain easily, and keep the pond away from crowded places as much as possibleThe water temperature should be about 18 degrees, and if the bait in the water is insufficient, it is necessary to feed food in time, and you can feed some nematodes or fish insects.

Feed food regularly and quantitatively every day, usually in the morning and afternoon. Freshwater sharks have strong resistance to hypoxia and wide adaptability, but their resistance to low temperature is weak. The appropriate temperature is 20 34, the optimal water temperature for growth is 26 32, the water temperature is lower than 18, the activity is slow, the response is sluggish, and the water temperature is lower than 12 and begins to die.

The fish has a mixed diet, the juveniles are fed on zooplankton, and the adults are fed on aquatic plants and artificial compound feed, and the feed protein requirement is 28% 32%.

Growth and reproduction

Water sharks eat miscellaneous, eat a large amount, grow fast, when the fry (3 cm and 4 cm) are bred for 4 months, the weight can reach more than kilograms. The fish matures late, is reared for 3 to 4 years, and can be reproduced when it weighs more than 3 kg. The breeding season is from April to September, and it is a one-time spawning fish of the year.

Freshwater sharks mature late and can only breed after 3 to 4 years and weigh more than 3 kilograms. From June to September every year is the reproductive season, eggs are laid once a year, and the eggs are small, sticky, yellow-green, and transparent. Fingerlings are stocked with 5 to 10 cm in size and fry are planted in April and May when the water temperature is above 20.

Generally, the stocking density is 2000 per mu for monoculture, 100 per mu for polyculture, and 100 per cubic water body for net bucket boxes, with a survival rate of 90%.

Freshwater sharks can be raised in pond monoculture, pond polyculture, and cage culture.

1. Pond monoculture.

The pond area is 1 acre to 10 acres, and the water depth is meters to 2 meters; From April to May every year, when the water temperature is stable above 18, the seedlings with a size of 5 cm to 10 cm can be stocked, and the stocking amount per mu is generally 1000-2000, and the pond stocking capacity with better conditions can reach 2000-3000; Artificial pellet feed is fed twice a day, and the feeding amount is 3%-5% of the body weight of the fish.

2. Pond polyculture.

It can be polycultured with four major carp, tilapia, spotted forktail fish, shrimp, crab, etc., and the amount of polyculture per mu is generally 100-200 (5 cm-10 cm), without additional bait.

3. Nuclear reform of cage farming.

The size of the cage is generally 4 meters, 4 meters, 2 meters or 5 meters, 5 meters, 2 meters, the effective aquaculture water body is 25 cubic meters - 45 cubic meters, and the stocking size is 8 centimeters - 10 centimeters - 150 fingerlings 100-150 cubic meters. Feed artificial pellet feed, feed protein requirements of 28%-32%, floating feed is preferred.

Basic information on freshwater sharks

Freshwater sharks are