CATDOLL : CATDOLL: How long does it take to completely remove drug residues from fish?

1. How long does it take to completely remove drug residues from fish?

Generally, drugs can be considered metabolized at 500 degrees per day (average daily temperature x number of days). However, drugs like malachite green and chloramphenicol can be carried for life.

2. There is a medicine that is specifically used to kill tilapia, but will not harm other fish. What is the name of this medicine?

Use 40% emulsion to kill quickly (1 kg can be placed in 20 acres of pond, note: the water depth is 1 meter). However, it may also cause certain harm to other fish. Please use it with caution if there are many other fish.

3. What animal does not look like a fish but is a fish?

The lancelet is known as the least fish-like fish.

Amphioxus, also known as Bai's lancelet, slug fish, double-pointed fish or sea hair, is a precious marine animal. Due to its extremely special morphological structure, it has the characteristics of both invertebrates and vertebrates. It is a typical representative of the transitional type from invertebrates to vertebrates. Therefore, it is highly valued by the biological community at home and abroad.

The appearance of lancelet is very strange and interesting. It has a very small body, flattened on the left and right sides, pointed and thin ends, and a spindle-shaped body. It is generally only 4 to 5 cm long.

4. What type of fish is tilapia?

Tilapia - native to Africa, it is a tropical fish. The genus Tilapia includes more than 100 species, including subspecies. Tilapia has the characteristics of fast growth, high yield, omnivorous diet, few diseases and strong reproductive capacity.

5. Fish characteristics?

The shape, body temperature, bones and skin of fish are different from those of other animals. In addition, fish have an organ that other animals do not have - the swim bladder. The existence of the swim bladder is also the reason why fish can float in the water.

1. Shape

Fish have a variety of shapes, sometimes quite different, but in general most fish are elongated and streamlined. Generally speaking, fish that swim fast in the water have elongated bodies, while fish that swim slowly or live at the bottom of the water are relatively flat. But some fish have very strange shapes, such as seahorses. The smallest fish is less than 1 cm, and the largest fish (whale shark) can reach 18 meters.

2. Body temperature.

Fish are cold-blooded animals. The body temperature of some tunas and sharks (especially sharks of the family Carcharhinidae) is higher than the temperature of the surrounding environment. Bluefin tuna is the only warm-blooded fish.

3. Bones

The skeleton of a fish is made of cartilage (cartilaginous fish) or bone (bony fish). There are four to seven gills on both sides of the skull, of which the front one has evolved into the zygomatic bone. The spine of a fish is connected to the skull, the ribs in the chest are connected to the spine, and there are long spines extending from the spine on the back, tail and abdomen.

4. Skin

Fish have two layers of skin: the outer layer contains glands that secrete mucus, and the inner layer contains many connective tissues, scales and pigment cells. The outer layer of mucus helps fish reduce drag when swimming. Cartilaginous fish do not have mucus, but the tiny, tooth-like protrusions on their skin have a similar function.

5. Fish bladder

The swim bladder is an inflatable sac-like organ in the fish's body. Its main function is not breathing. Fish rely on the swim bladder to adjust their specific gravity. Fish can use the swim bladder to slowly rise or descend without moving. Most bony fish have a swim bladder, an organ for regulating buoyancy.

6. Cold-resistant fish?

All fish species in northern China are cold-resistant, such as the common carp, crucian carp, silver carp, bighead carp, grass carp, black carp, sturgeon, black carp, loach, yarrow, schizothorax and so on.

7. Marine fish?

A: There are many kinds of marine fish. Common ones include shark, yellow croaker, horseface fish, eel, ox tongue fish, Spanish mackerel, snapper, silver pomfret, turbot, hairtail, etc. These fish contain a lot of vitamins, collagen and unsaturated fatty acids, which are good for the body. Not only can they supplement nutrition, but they can also improve skin quality, and they are low in fat and will not make you fat.

8. Unpopular fish?

Freshwater perch is commonly known as perch, also known as flower perch. It tastes delicious, has few fine bones, tender and white meat, and basically has no fishy smell.

Eel is also called eel. It contains calcium, vitamin A and other nutrients.

Catfish is also called bearded fish. It is rich in protein and fat, with few bones, tender meat and rich flavor.

Bighead carp has a big and fat head.

Northeastern flatmouthed goby.

Stream flatnose goby.

Pseudohylidium trilineatum

9. Amazon fish?

The Amazon River is home to caimans, freshwater turtles, and aquatic mammals such as manatees and freshwater dolphins. On land, there are jaguars, slender-waisted cats, western ibex, tapirs, capybaras, armadillos, and more. There are also 2,500 species of fish and more than 1,600 species of birds.

Species native to the Amazon River: piranhas, apple snails, Helena butterfly, and Menglun royal water lily.

10. Swamp fish?

Swamp double-bowtooth cichlid.

It is a species of Cichlidae in the order Perciformes, suborder Wrasse, class Actinopterygii, distributed in the Lake Malawi basin in Africa, with a habitat depth of 20-220 meters. It can reach a body length of 15.4 cm. It lives in coastal areas and open waters and feeds on small fish. Its living habits are unknown and it can be used as an ornamental fish.

They are fast swimmers and natural hunters. In their native environment, they mainly feed on copepod plankton in open waters, and sometimes also prey on juvenile Usipa sardines.