They are widely used in European waters for Atlantic salmon, sea trout and pike. There is a run of Atlantic salmon and a sparse run of sea trout. In addition the Plym is rich with brown trout, sea trout and salmon. Aled have runs of migratory trout, otherwise known as sea trout or, locally, sewin . It is also a very prolific salmon and sea trout river. Goosanders and cormorants prey on sea trout and salmon. The sea trout fishery collapsed in the 1980s and 1990s. Smoked fish such as sea trout or sewin may be served accompanied with poached eggs. Restrictions in Norway are limited to anadrome species, like Atlantic salmon, sea trout, and lobster. Powerful swimmers, including salmon and sea trout, find it easy to pass through many structures. It is noted for its sea trout and salmon fishing. The river supports a number of migratory fish, including salmon, sewin (sea trout), and eel. Fish in the loch include salmon, sea trout and brown trout. For salmon and sea trout game licence is required regardless of location. Sea trout are popular with anglers and as food.