Their average length is 60 cm, but they can grow up to 130 cm in length and weigh up to 20 kg under favourable habitat conditions. The sides have many orange and red spots ringed with a light blue. In freshwater the top of the trout is an olive color with brown and black spots with the ventral side being tan to yellow. Breeding males will develop a hook-like, upward-facing protrusion on the lower jaw called a kype. Adult brown trout are between 35 and 60 centimetres (14 and 24 in) long, and can weigh from 0.5 to 2.4 kilograms (1.1 to 5.3 lb). Sea trout kelts (post spawn) return to their silvery stage as they migrate back to saltwater. However, once they return to freshwater they quickly take on the normal coloration of resident brown trout in preparation for spawning. Description Īnadromous brown trout are a silvery color with faint black spots. Early angling literature often referred to sea trout as white trout or bull trout. Originally the name Salmo trutta was used to refer specifically to the anadromous or sea-run forms of brown trout. They represent ecological forms with different migration behaviour. morpha fario, although previously they have been considered different subspecies or even species. Taxonomy Īs treated here, the anadromous sea trout Salmo trutta morpha trutta is not taxonomically distinct from the freshwater-resident forms of the brown trout, i.e. and in Canadian rivers on both the Pacific and Atlantic coasts. Anadromous behavior has been reported in the Columbia river and its tributaries in the U.S. Brown trout introduced into freshwater habitats in Tasmania, Victoria, New Zealand, Falkland Islands, Kerguelen Islands, Chile and Argentina have established anadromous populations when there was suitable access to saltwater. They do not occur in the Mediterranean Sea but are found in the Black and Caspian Seas and as far north as the Barents and Kara Seas in the Arctic Ocean. Range Īnadromous brown trout are widely distributed in Europe along the Atlantic and Baltic coasts, the United Kingdom and the coasts of Iceland. 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). 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). Other names for anadromous brown trout are bull trout, sewin (Wales), peel or peal (southwest England), mort (northwest England), finnock (Scotland), white trout (Ireland), Dollaghan ( Northern Ireland and salmon trout ( culinary).
Sea trout is the common name usually applied to anadromous (sea-run) forms of brown trout ( Salmo trutta), and is often referred to as Salmo trutta morpha trutta.
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