The brown trout (Salmo trutta) is a salmonid fish which actually has two varieties: the salt water 'version' Salmo trutta trutta - also known as the sea trout - and the fresh water species Salmo trutta fario. Some experts even distinguish a third variety: the lake trout Salmo trutta lacustris.
Although the most common catch is a trout of around 1kg (2.2lb), some brown trout grow up to 20kg (45lb) and about 1 meter long (especially in the lakes).
Trout love insect larvae, nymphs which is why they are one of the favourite fish for fly fishing enthusiasts. Brown trout are also caught spinning with all kind of lures such as spinner baits, spoons, plugs, jigs, poppers, rubber lures and live or dead baitfish.
Brown trout were a native Eurasian species, distributed from Norway, Germany, the Alps to Spain and from the Scotland, Ireland and England to Pakistan. Sea trout are found in Europe along the Atlantic adn Baltic coasts, United Kingdom and Iceland.
From the second half of the 19th century, brown trout have been introduced first in Tasmania and Australia, later in Africa and in the Americas.
They are now established and have self sustaining populations in New Zealand, South Africa, Kenya, Chile, Peru, the Falklands, Patagonia in Argentina, Canada, United States (Arkansas, Michigan...).