Sea trout is the common name usually applied to anadromous forms of brown trout, and is often referred to as Salmo trutta morpha trutta. Other names for anadromous brown trout are sewin, peel or peal, mort, finnock, white trout and salmon trout .
The term "sea trout" is also used to describe other anadromous salmonids, such as coho salmon (Oncorhynchus kisutch), coastal cutthroat trout (Oncorhynchus clarkii clarkii), brook trout (Salvelinus fontinalis), Arctic char (Salvelinus alpinus alpinus) and Dolly Varden (Salvenlinus malma). Even some non-salmonid fish species are also commonly known as sea trout, such as Northern pikeminnow (Ptychocheilus oregonensis) and members of the weakfish family (Cynoscion).