salmon
No they cannot, its why they're so called.
Well it depends on the fish. If it is a fresh water fish then it lives in fresh water, salt water fish live in salt water.
salmon
it denpents were the fish is from the ocean or fresh water lakes
fresh water fish are fish that live in fresh water fresh water is what you would get out of the tap at home as aposed to salt water witch contains salt
flying fish
no they like to suck the salt off of salty rocks so they are controlled in government utilities where they are fed salty rocks.
they eat other fish in the water cuz fish cant come out of the water
Tropical freshwater fish are fish from the tropics (water temperature around 78-80F) that live in lakes and rivers, instead of the salty ocean.
Depending on if the fish lives in fresh or salty water they may urinate a lot (if they live in freshwater) or living in a salty environment can make them pee less but it's very concentrated.
Fresh water
...........how can a fish tank have fresh water?????