Fish that can live in both habitats
Only some fish can live in saltwater and freshwater. Those fish are called euryhaline fish. There are two types of euryhaline fish, anadromous and catadromous. Anadromous fish are born in freshwater, but they spend most of their lives in salt water, or at sea. Catadromous fish live mostly in freshwater, but they deposit their eggs or spawn, in saltwater.