Euryhaline
Able to live in a wide range of saltiness, from fresh water to the sea; stenohaline fish tolerate only a narrow range.
Also: stenohaline
Euryhaline fish handle big changes in salinity. Milkfish, barramundi, mullets, the pearlspot and many tilapias move between rivers, estuaries and the sea, and the bull shark swims hundreds of kilometres up rivers such as the Amazon and the Zambezi. These fish are common in estuaries, backwaters and mangroves, where salinity swings with tides and monsoons. Stenohaline fish, which include most reef fish and most freshwater fish, survive only within a narrow band and die if moved.