Salt water
It depends, Tuna is salt water, Trout is fresh, halibut is salt, flounder is salt.
saltwater fish
Yes, halibut are saltwater fish. They primarily inhabit the North Pacific Ocean, particularly in regions like the Bering Sea and along the coasts of Alaska and Canada. Halibut are bottom-dwelling fish, known for their flat bodies and can grow to significant sizes. They are popular targets for commercial and recreational fishing.
Freshwater
saltwater fish need to breath in saltwater and not fresh water. just like we need to breath in oxygen and not carbon dioxide.
Fesh
fresh water fish
Saltwater fish don't live in freshwater.
There is nothing extra special about saltwater fish that helps them with their environment. Some fish actually can live in fresh or saltwater.
Saltwater
they drown
Some Can And Some Can't.