In fact, some fish need to drink water, some fish do not, and some fish can adapt to both, depending on the environment they are in. For example: fish that live in fresh water need to drink water, because their body contains a level of salts higher than the level of water, so the water enters inside them to balance this equation, through their gills. In order to maintain the balance of the fish, some tissues need some salt to remain inside, and here there is the role of the chloroid cells, as they control the flow of dissolved salt between the cell membranes, and balance between the percentage of salt inside the fish and its percentage in the river water. As for fish that live in salt water, they do the opposite, although they drink large quantities of water, but they need to take it out and keep the salt to balance between the percentage of salt in their body and the percentage in the sea, for example. The proportion of the salt entering her body is balanced through the mouth, after which the remainder is purified from the salty water, through the kidneys, and through the gills on both sides of it.

Fresh water fish absorb water through their skin and gills, Saltwater Fish actually do drink water. In saltwater fish, they have to drink because their body's concentration of salt is lower than the surrounding water. Therefore, they have to drink huge amounts of water every day to stay hydrated. In Freshwater Fish , their salt concentration is higher than that of the surrounding water, and, as osmosis dictates, they absorb water through their highly permeable skin. To keep from bursting, freshwater fish actually have to excrete water, up to 10 times their body weight daily, unlike saltwater fish.

Freshwater fish do not survive in salt water

Everything needs water to survive. The fish probably soak the water in their gills to help them swim.

Fish absorb water through its gills and skin. This process is called as osmosis. As well as getting water through osmosis, saltwater fish need to purposefully drink water in order to get enough into their systems.

Obviously,fish drink water because it lives in water. Fresh water fish absorb water through their skin and gills, Saltwater Fish actually do drink water. In saltwater fish, they have to drink because their body's concentration of salt is lower than the surrounding water. Therefore, they have to drink huge amounts of water every day to stay hydrated. In Freshwater Fish, their salt concentration is higher than that of the surrounding water, and, as osmosis dictates, they absorb water through their highly permeable skin. To keep from bursting, freshwater fish actually have to excrete water, up to 10 times their body weight daily, unlike saltwater fish.

Whether a fish drinks water depends on where the fish lives. Generally, fish that live in freshwater will not drink water for their entire lives, while fish in seawater have to drink water frequently.

In fact, some fish need to drink water, some fish do not, and some fish can adapt to both, depending on the environment they are in. For example: fish that live in fresh water need to drink water, because their body contains a level of salts higher than the level of water, so the water enters inside them to balance this equation, through their gills. In order to maintain the balance of the fish, some tissues need some salt to remain inside, and here there is the role of the chloroid cells, as they control the flow of dissolved salt between the cell membranes, and balance between the percentage of salt inside the fish and its percentage in the river water. As for fish that live in salt water, they do the opposite, although they drink large quantities of water, but they need to take it out and keep the salt to balance between the percentage of salt in their body and the percentage in the sea, for example. The proportion of the salt entering her body is balanced through the mouth, after which the remainder is purified from the salty water, through the kidneys, and through the gills on both sides of it.

Fish do absorb water through their skin and gills in a process called osmosis. To stop the exploding fish phenomenon, their gills have special cells that selectively pump salt in, or out of their blood. In freshwater fish, the cells constantly pump salt in, and in saltwater fish, they constantly pump salt out

Marine fish do drink water, and they do so continuously. ... Although when doing this they also ingest sales, these are not absorbed because they do not need them, at least not most of them, and they are expelled through the gills and urine, which is very concentrated and with little amount of water.