Why do you put a glass of water next to you when you eat fish?

Do fish want to drink water? Seeing this question, many people may feel bored, fish don't drink water, why are they soaked in water every day? Besides, it can't do without water, and as soon as it leaves water, its life will end.

So, the answer to this question is obvious and clear at a glance. However, is this really the case?

Just like I learned as a child, the fish does need to "drink water" constantly, and the fish can't live without water because it doesn't have lungs. Can't breathe straight like we do. But it has its own "lungs", which are the gills.

The gill of the fish is mainly composed of three parts: gill filament, gill raker and gill arch, the gill filament is like the teeth of a comb, there are many gaps in the middle, and each gill filament is covered with gill patches, the gill filaments contain a lot of capillaries, when the water flows through the gill filaments, oxygen is absorbed through the capillaries on the gill filaments, and then through the blood circulation to supply the needs of the fish's body, and the water is filtered by the gill filaments and returns to the water body where the fish lives.

Therefore, the fish keeps drinking water, it absorbs the oxygen in the water with its gills, and then discharges the water again, and it does not really drink water into the stomach, so this is not drinking water in the real sense, so whether the fish should drink water or not, drink water into the stomach to replenish its own water.

In fact, this question involves the regulation mechanism of osmotic pressure in fish, and the answers are different for different fish, generally speaking, fish living in freshwater do not need to drink water for their entire lives.

Whether fish drink water or not depends on their species, and not all fish will drink water. According to the environment in which different species of fish grow, we divide them into freshwater fish and marine fish, where freshwater fish do not need to drink water throughout their lives, while marine fish must drink water regularly.

It's a question like if you eat air or not, and some freshwater fish don't drink water for the rest of their lives.

If you can't eat air for dinner, the fish will definitely not drink water, not to mention, some freshwater fish can't drink water at all, otherwise it will cause death.

No, fish don't drink water when they eat, just like we don't eat air when we eat.

Some fish also need to boost their metabolism, while some freshwater fish don't drink water for the rest of their lives.

No, it's just the environment they live in.

Freshwater fish don't, saltwater fish do.

No, fish don't drink water when they eat.

Fish also need water to boost their metabolism and assist in the elimination of waste products from the body.

Fish will actively drink water in the water. Inside the fish's body, there is a physiological phenomenon called osmoregulation, in which the fish needs to excrete excess water from the body through excretion, and absorption and drinking water are important ways for the fish to maintain normal fluid permeability and stabilize internal water. Therefore, fish actively drink water in the water to maintain the water balance inside the body.

Digging. In addition, fish in the water also need nutrients to maintain normal life activities. Nutrients in water include oxygen-containing water molecules, plankton, etc. As a result, fish also devour the nutrients in it by actively swallowing water. Stove leakage.

It is important to note that the drinking behavior of fish is different from that of humans. Humans drink water to replenish the lack of water in the body; Fish, on the other hand, mainly to maintain the water balance in the body and obtain nutrients at the same time. Therefore, there are differences in the purpose and manner of drinking water in different organisms.

In addition to fish, other aquatic organisms also need to actively regulate water and absorb nutrients in the body. For example, dolphins and whales can get nutrients and consume excess salt by swallowing seawater while regulating their body's water balance. Judgment sedan chair.

In short, fish actively drink water in water to maintain the body's internal water balance and nutrient intake. This behavior is different from that of humans drinking water, but it is necessary for life-sustaining activities. <>

Fish are aquatic animals that usually live in water and breathe from their gills. Therefore, fish do not need to drink water like humans or other land animals. According to the physiological characteristics of the fish, the fish takes in the water and nutrients it needs from the water without actively drinking it.

However, in some cases, the fish may need to take in more water. For example, when there is not enough oxygen in the water, some fish may actively ingest the water to absorb more oxygen through their gills. Also, in case of starvation or dehydration, some fish may ingest some water to meet the body's needs.

In addition, fish also need to deal with the balance of water and electrolytes in the water to maintain a stable state in the body. For example, freshwater fish versus saltwater fish need to deal with different water and electrolyte differences to adapt to the environment in which they live. Therefore, the kidneys and gills of fish play a very important role in the processing of water and electrolytes.

In conclusion, fish usually do not actively drink water because they can take in the water and nutrients they need. However, in some specific cases, fish will actively consume water to meet the body's needs and play an important role in the processing of water and electrolytes. <>

Marine fish drink water, freshwater fish don't. The reason for this difference is that the osmotic pressure of the water body is different, and the water will permeate from a place with low osmotic pressure to a place with high osmotic pressure. The osmotic pressure of fish in freshwater is higher than that of water, so it is necessary to replenish water without drinking water and drain water.

The osmotic pressure of seawater is lower than that of fish, so you need to drink water constantly to replenish water. <

Freshwater fish do not need river water, although the fish will keep opening their mouths in the water, but this is only to allow the water to pass through the gill filaments to obtain oxygen, not to inhale water into the body. The reason why you don't drink water is mainly related to the osmotic pressure of the water body, which is lower than that of fish, so the water will naturally seep into the fish's body, and the fish not only can't drink water, but also need to discharge the water, otherwise it will swell to death.

Unlike freshwater fish, fish that live in the sea need to drink water, and they have to drink it regularly. The reason for this is also the relationship of osmotic pressure, the osmotic pressure of seawater is high, so the water in the fish will naturally penetrate from the body to the outside of the body, so they must keep drinking water to replenish water. Normally, water enters the intestine from the mouth and enters the body through the osmotic action of the intestinal wall, increasing the water content of the body fluid.

Not all marine fish need to drink water, such as sharks and rays. This is due to the fact that their body fluids contain urea, which is harmful to most animals and is usually excreted as soon as possible, but these two fish preserve it to prevent them from seeping, so that the osmotic pressure of the fish is higher than that of the seawater, and the water is naturally replenished, and at the same time they also need to drain water.

Will fish and ants take the initiative to drink water when they are stuffy in the water?

Whether fish drink water or not depends on their species, and not all fish will drink water. Some freshwater fish do not need to drink water, while saltwater fish need to drink water frequently. Fish feed mainly on other small animals that live in or near the water's edge, such as insects, worms, snails, shellfish, cuttlefish, shrimp and crabs.

According to the growth environment of fish, there are different types of fish according to different species. Freshwater fish generally live in freshwater environments, while marine fish live in the pelagic layer of the ocean at depths of up to 200 meters.

There are also fish with specific functions, such as the flying fish, such as the tern ray, which has a flat body shape, a dorsal fin opposite the anal fin at the back of the body, and a pectoral fin that is long and wide and can be stretched like dragonfly wings. There are also walking fish, such as the turtle shell perch, which can crawl on land by swinging its gill cover, pectoral fins, and rolling over. The supragill apparatus of the turtle shell perch is very well developed and is able to breathe air, so it can survive after a period of time out of the water body.

Turtle shell perch feeds on small fish, shrimp, zooplankton, insects and their larvae.