The guppy is a fresh water fish.
Freshwater. I have some
Guppies are freshwater fish: Sea horses are saltwater fish
Obviously, since they are fish they will swim but Guppies (Lebistes reticularis) are freshwater fish and will die shortly after being placed in saltwater.
A freshwater fish cannot be with a saltwater fish.It depends on the fish. Guppies are considered "freshwater" but will live happily in SW if properly acclimatized. Mollies are the same way.
there are types of Grouper but there mainly in Saltwater. in fresh you can only find them in a few lakes none of witch in united states
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
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.