It will die because it is not used to the new climate. it would be like a polar bear in Hawaii. it is going to die because it needs the cold air. it has to be in the cold.
it will explode because of hypotonic solutions.
They will die. I did it once and my fish died.
Saltwater is a lot more dense and would crush the freshwater fish internally.
Because saltwater fish can only breathe in saltwater (as in the ocean) and freshwater fish can only breathe in freshwater (as in tap water.)
There are freshwater drum, and saltwater drum species.
saltwater
They are freshwater fish.
A saltwater fish tank can be half freshwater and all of the saltwater fish will live but not for very long.
saltwater
Saltwater would kill a tetra fish! I think they are all freshwater fish and putting a freshwater fish in saltwater is a very, very bad idea.
The cells of the saltwater fish would gain too much water.
They are freshwater fish.
Certain freshwater fish can survive saltwater conditions; examples are black mollies, mono's and scats. All of these fish aren't truly freshwater or saltwater, they are Brackish. Brackish is between freshwater and saltwater, and so these fish are highly adaptable.