When fresh water runs into the oceans, it becomes salt water. How does it, again ,become fresh water ?

Question

Do fresh water species (fish) flow into salt water . At what point do they stop. And visa/versa for salt water fish ?

Answer 1

The water cycle is what makes salt water fresh again. Evaporation of the water, into clouds, into fresh water rain.

As for the fish, it will vary by species. Some fresh water fish can tolerate high levels of brackish (semi-salty) water, others can not. The same is true for salt water fish. So, each species will stop when they reach their own personal tolerance level.

Answer 2

Salmon are born and die in fresh water but live their lives in salt water. Generally fish are either salt or fresh water and do not do well in the other environment. There are animals adapted to the tidal areas and estuaries that live in both the fresh and salt environments.

Also, water from the ocean is evaporated by the heat of the sun. The evaporated water falls as rain and snow and is collected in the rivers and streams which flow into the oceans completing the cycle.

Answer 3

Evaporation takes the salt out and rain replenishes the fresh water supply. Most fish species are either salt of fresh. Few are capable of living in both. Some can live for short times in waters with a mix of fresh and salt. Salmon leave the salt oceans and live in fresh water long enough to spawn. The bull shark can actually live in fresh or salt. There may be other species, but if so, very few.

Answer 4

Only the water evaporates, and the salt stays in the ocean. Actually the ocean is getting saltier because of what was dissolved by the fresh water on its way downstream.
The fish seem to know how far downstream they can go and turn around. Some salt water fish spawn in fresh water.

Answer 5

Solar power. The sun evaporates pure water from the oceans which later falls as rain.

There is usually an area where fresh water is mixing with saltwater. When it's big, we call it an "estuary". Chesapeake Bay is a good example. Fish stay very close to their areas, freshwater and saltwater. When they start getting to where the amount of salt is not the best for them, they naturally turn around.

Answer 6

By evaporating and raining down as fresh. No salt water is separate from fresh except for maybe fresh water runoff into the ocean.

Answer 7

hey!! there's some thing called the water cycle.this is how water is recycled by mother nature.water evaporates from the sea or any who water source , leaving any impurities behind, forms clouds and falls as rain renewing the sources of fresh water.
fishes that venture too far out of their natural environment will die, but there are some species of fishes who can live for a time in water that is not natural to them.
for example it is known that the bull shark is known to have traveled many kms in to fresh water to hunt for their prey fishes, certain species of fish live in the sea but return to fresh water to breed, for example the salmon.
i hope that this has answred your question.

God bless

Answer 8

It is evaporated by the sun and comes back down as fresh water.
I guess fish a fairly versatile but if they are fresh water critters they would likely search out fresh water and vice-versa.

Answer 9

when the water evaporates from the ocean the salt remains in the ocean. Thats why rain isn't salty.

Answer 10

Check the water cycle