Do fish drink water?
Though marine fishes drink a lot of water, their freshwater relatives don’t drink nearly anything. The root of this difference lies in the needs of fish to maintain a normal balance of salt and water in the body.
The water in the ocean three times saltier than its own liquid environment living in the ocean fish. As a result of a natural process known as osmosis, water body sea fish rushes out through the skin and gills. To compensate the lost liquid, saltwater fish forced to consume large quantities of sea water.
The concentration of salt in the body of freshwater fish exceeds its content in the surrounding water, which is why freshwater fish do not drink, like a sea, and constantly absorb water through the skin. The excess liquid they secrete in copious urination.
1. The amount of water that absorb marine fish depends on the degree of salinity of the CE. Than saltier water, the more fish drink.
2. The gills of fish that lives in salt water, absorb a certain amount of salt.
3. Under the action of osmosis, the fish may pass through the gills of a large amount of water.
4. Excess salts are excreted in the urine.
5. Water, swallowed saltwater fish, absorbed by the intestines.
Freshwater fish excrete salt and absorb water through the skin, so they don’t need to drink water. The salt level in the body of freshwater fish filled with food and ions (salt) deposited in the gills.
1. Digimasterii osmosis, water enters the fish body through the gills.
2. A portion of salt is lost through the gills as a result of osmosis.
3. Freshwater fishes have a surplus of water that they excrete in the form of very dilute urine.
If fish swap
In its usual home of marine fish to maintain normal water-salt balance by drinking large amounts of water and releasing the excess salt. Fresh water fish absorb water, diluting it with liquid environment of the organism. Unable to hold salt or get rid of the excess water, the fish dies.
Usually freshwater fish regulates the level of salt in the tissues of his body, absorbing and releasing salt water. In salt water fish loses water that cannot compensate; the salt content in the body rises to a deadly level.
Several fish species are diadromous, meaning that they can live in salt and in fresh water by adjusting the liquid composition of the organism under environmental conditions. They drink water — or abstain from it — depending on the salt concentration in their dwelling. In addition, their gills and kidneys are able to quickly switch from processing salt water to fresh, and Vice versa. Salmon that live in the ocean, but spawn in rivers, and sturgeon, and lamprey pysanki inhabiting the mouths of rivers, too, belong to the adaptable fish. Some species of diadromous fishes shown in the illustration above.