Sea Trout

Salmo trutta

Current British record: 28lb 5oz (1992) J Farrent, Calshot Spit, River Test

Sea Trout

The Sea Trout is very similar in appearance to the Salmon, The Sea Trout is more round in shape with a rounder head. The Sea Trout will have more spots than a salmon and these will appear along its flanks and down to its belly. You will find that the end of it body where it meets the tail is thicker than a Salmon also. Fish for these at night as this shy species is more likely to take a fly under the cover of darkness.


It is thought that the average weight of a UK Sea Trout ranges between 2 and 4 pounds. With a specimen weight of 6lb these can get quite large. The UK best stands at 28lb 5oz in 1992.


The average length of an adult Sea Trout is around one metre from tip to tail.


Records suggest that the maximum age for an adult Sea Trout is between 2 to 4 years of age.


Gravelled areas with cobbles and boulders where they can hide and rest. Sea Trout thrive in clean, fresh and unpolluted waters. Sea Trout like to live in rivers which have natural grassy banks with trees near the river edge. This is because lots of insects live in the overhanging grasses and trees and can be easy meals when they fall into the water. Deciduous trees are also useful to shade the edges of riverbanks. This shade provides cover for the fish so that predators find it harder to seek them out.


This shoaling species is popular with anglers due to their fighting behaviours and their impressive determination to escape.


Sea Trout will only feed when at sea, this is done to gain strength for the swim upstream to breed. When in the ocean they will eat shrimp, prawns and other small fish. Sand eels are a Sea Trout’s favourite meal and many of the largest Sea Trout are caught on this bait. Catching a Sea Trout is tough, the use of worms, plugs, prawns sand eels and flies are the top methods.


It is thought that the average age of sexual maturity is around 3 years of age.


Breeding times are usually between October and December. Sea Trout will breed in shallow areas where there is a good bed of gravel. Sea Trout prefer well oxygenated clean waters allowing a better chance of survival or their 800 eggs per pound in weight. Sea Trout will go through the same life cycle as other salmonid’s starting with the egg, then growing into Alevin then into small fry and again growing further into Parr, these stages can take up to two years to complete. Once the Parr grow, it will take on its metallic look and will makes its way down stream to the sea. A young migrating Sea Trout is called a Smolt. Small Sea Trout or Smolt’s will only spend a few months at sea before returning to their birth place, Sea Trout will usually breed on their second or third trip.


All information is from a variety of sources, if you think we have missed something? Email with your update.

See you on the bank.

The Fishing UK Team!

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