Because saltwater fish can only breathe in saltwater (as in the ocean) and freshwater fish can only breathe in freshwater (as in tap water.)
They only eat salt water fish.
Loaches are freshwater fish, for example, the clown loach which is a freshwater fish.
It depends on which fish it
No. They are freshwater fish only.
No, they are saltwater species only.
They are freshwater fish.
Redfish are fresh water
Piranhas are freshwater fish, living in the Amazon basin.Actually they are both freshwater and salt.... Mostly freshwater though!
Skate or ray fish have no bones. Only cartilage. I don't know about any freshwater ones one salt ocean.
Well, there are 2 types of fish, saltwater fish, and freshwater fish. Only put in saltwater if you own a saltwater fish. Note: Saltwater fish could live safely in freshwater, but freshwater fish will suffocate in saltwater.
There is no such thing as a freshwater clown fish