Where can fish live, and where can fish live for a long time

Divers have seen well-known shrimp, squid, octopus, spear squid, and sperm whales and other large sea mammals in thousands of meters of water; Schools of largemouth angler fish were found at depths of 2,000,300 metres: in the water layer below 8,000 metres, new species of fish were found only 18 centimeters in size. In the deepest part of the Mariana Trench, animals are rarely seen.

If people hadn't seen so many deep-sea creatures with their own eyes and only listened to their rumors, they would have thought that this was a fantasy. Because, these seemingly very weak beings have to withstand hundreds of atmospheric pressures first. For example, a small fish that people see at more than 7,000 meters of water is actually subjected to more than 700 atmospheres.

That is to say, this small fish is under 700 kilograms of pressure at all times on an area the size of our fingernails. This pressure can flatten a steel tank. It's amazing how much fish can swim freely.

In the abyss at a depth of 10,000 meters, people saw small fish and shrimp of several centimeters. These small fish and shrimp are subjected to pressure of nearly a ton. Such a great pressure, not to mention a tank, even something harder than a tank, will also be squashed.

Where it can live, the right water temperature, water quality, dissolved oxygen, food.

Fish live best in bottles filled with river water, and fish in bottles filled with cold white open are the worst.

1. The river water is soft water, so it is most suitable for the growth of small fish, but there are many parasites and bacteria in the river water, which will be harmful to the health of small fish.

2. Tap water contains chlorine particles for disinfection, which can poison small fish, so it is also harmful to fish.

3. The cool white that has just cooled, the oxygen content in it is very low, and the itch has been volatilized by the boiling process, so the fish will suffocate, and it is not suitable.

How it works:

In the process of fish farming, the main reason why it does not last long is:

The problem of water. We use water in our homes.

Tap water, which is medicated and sterilized, is very different from river water, and those bactericidal substances can also reduce the lifespan of the fish. Therefore, in order to be able to live longer, you can connect tap water in a container, pay attention to the large opening, put it on the balcony to dissolve the substances in the water before using it, and let it sit for two or three days or a day or two.

Note that the container for fish farming should be large and high, and should not be too full of water, because fish will like to jump up at night, and often die of lack of water after jumping out. And put it in a ventilated place.

When changing the water for the fish, it must be poured gently, not too urgently, and the current should not be too large, otherwise the water will impact the body of the fish, causing injury, which will naturally reduce the lifespan. Life is fragile.

Fish like to live in groups, and a fish is often lifeless, so there should be at least two fish, so that there will be spirituality, just like people, who will get sick if they are lonely for a long time.

It is best to choose glass products when raising fish, porcelain is also OK, do not choose glue, so that some bad substances in it will also affect the life of the fish.

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First, build a pond of suitable size according to the size and number of wild fish, and inject the appropriate amount of river water. Then select some robust fish fry and put them in the pond, feed some small shrimp, earthworms, tadpoles or brown crabs every day, and do a good job in water quality and disease prevention.

1. Tap water raising, just connected can not be used, and it will take three days to use it. 2. In addition to eating artificial bait, I prefer to eat bloodworms, snakes, jumping insects, etc., to ensure the freshness of the bait, and the spoiled ones cannot be fed. 3. Feed once a day, feed at a fixed time, and eat within five minutes.

If you feel that feeding once is not enough, you can also feed twice, but take the form of eating smaller meals and more meals, feeding five minutes at a time, and once in the morning and once in the evening. 4. Keep the water temperature constant, you will definitely get sick when it is hot and cold. 5. If there is no filter, it is necessary to suck out the fish feces on time every day, and then add the same amount of trapped water as suction (need to be trapped for three days), so that the water can only be changed a little, and the water can be kept clean and the oxygen injected.

Put the trapped water next to the fish tank a few hours before the water change, so as to ensure that the new water to be replaced is kept at the same temperature as the water in the fish tank, and the fish will not be irritated.

Dear, please refer to it

Fish have the characteristics of being suitable for living in water: the color of the body of the fish is the protective color of the fish. The body is streamlined, large in the middle and small at the end.

The surface of the body is covered with scales, which protect the body; There is a layer of mucus on the surface of the scales, which reduces the resistance of the water when swimming. There is a lateral line on both sides of the body, which is connected to the nerve, which is mainly used to determine the direction and sense the flow of water. The body of a fish has pectoral fins, dorsal fins, pelvic fins, and caudal fins, which are the locomotor organs of the fish in the water.

Fish breathe with gills. There is a swim bladder in the body, the main role is to regulate the specific gravity of the body, the swim bladder in the coordination of the fins, can make the fish stay in different water layers. Fish belong to the lower animals of vertebrates because they cannot live without water all their lives, breathe with gills, heart-atrium-ventricles, a circulatory route, and arterial and venous blood are mixed; In particular, the reproduction of fish is naturally hatched by in vitro fertilization, and the body temperature is not constant.

The role of the fin: The dorsal and anal fins mainly play a stabilizing and balancing role when moving. The tail fin works with the muscles on the side of the body to propel the fish and control the direction.

The main function of pectoral and pelvic fins is to maintain the balance of the fish, cooperate with the body of the fish, and adjust the lifting of the fish. However, pectoral fins are more versatile than pelvic fins, and they can be used like oars to move the fish forward slowly. Because the gills of a fish are only adapted to absorb oxygen from the water and cannot absorb oxygen from the air, it can only live in the water.

Freshwater fish live in rivers and lakes; Saltwater fish live in the sea or in saltwater lakes.

Fish that have a migratory habit swim back to their native spawn at a fixed time every year.

Fish, of course, live in the water.

Who said that fish must live in water, this kind of fish lives in trees and especially does not like water!

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