Brown Trout are very interesting fish because some Brown Trout live in freshwater all their lives, while other Brown Trout migrate to the sea and return to the rivers they were born in when they want to spawn. Brown Trout that migrate to sea are commonly known as ‘Sea Trout’ and it is not really clear why some of these fish go to sea, while others don’t. Brown Trout can be found throughout England in clean cool rivers, streams and lakes which have quite a lot of oxygen. They are shy and wary fish that try to hide under cover as much as possible.
The Brown Trout is a beautiful-looking fish that is approximately fifty centimetres in length and weighs around two kilogrammes. It usually has a greenish brown body and the top part of its body is speckled with lots of black and red spots. Some of the black and red spots have white circles around them. The Brown Trout also has a pale yellow coloured belly. It can also change its body colour to match its surroundings.
Brown Trout can be very territorial and the largest and strongest trout often takes the best position in the water where there is plenty of food. Brown Trout eat flying insects and land insects which have fallen into the water. They also feed on water boatmen, freshwater shrimps, worms and small fish such as young trout and salmon.