A preserved and cased trout, probably caught in the River Thames in the early 20th century.

BROWN TROUT
(When found in the Thames these are called Thames Trout)

Latin name - Salmo trutta

Colour - It is usually brownish or greenish with a darker back but the colour is variable. Greyish blue specimens occur and some are almost black.

Size - Growth is dependent on the surroundings and adults are often between 20-50m long. Trout can grow up to 140cm (55ins) long.

Charcteristics - The trout has many black spots on its head and body and some red spots. Its lower jaw is long and in old males becomes hooked. The younger trout are called parr and have around 10 marks (called parr marks) on each side of the body.

Habitat - The trout likes clean rivers which are high in oxygen.

Diet - It feeds on invertebrates, fish and crustaceans.

How fished for - Trout are today more often caught from stocked lakes than rivers such as the Thames.