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Species Spotlight: Sea Trout

Species: Sea Trout

Scientific Name:  Salmo Trutta

Also known as: Sewin, Peel, White trout

SEA TROUT Description

Sea Trout are a silvery colour with faint black spots. However, once they return to freshwater they quickly take on the normal colouration of the resident brown trout in preparation for spawning. They return to their silvery stage as they migrate back to the saltwater. Adult Sea Trout are between 18 to 56 centimetres 7.1 to 22.0 in long and can weigh from 20 to 53 lb. Breeding males will develop a hook-like, upward-facing protrusion on the lower jaw called a kype.

Average SEA TROUT size

On average, adult sea trout can range from about 1.5 to 8 kg (3.3 to 17.6 lbs), with some exceptional individuals growing larger. The size of these fish is influenced by a myriad of factors including their diet in both freshwater and marine environments, the length of time they spend in the ocean (which can range from a few months to several years), and the specific conditions of their habitats. Juvenile sea trout, known as “smolts,” are typically much smaller when they first migrate to the sea, measuring in the range of 15-20 cm (6-8 inches). As they grow, their size can increase significantly before they return to freshwater to spawn. The variability in their growth rates and sizes is a reflection of the dynamic ecosystems they inhabit and the complex life cycle they undergo, transitioning between freshwater rivers and the vast ocean.

Where to catch SEA TROUT

Sea Trout can be caught in many saltwater estuaries around the world as they make their migration to and from Saltwater. One of the top destinations to target the Sea Trout in Argentina are such places as Las Buitreras, Howenh Lodge, Bella Sofia and El Rincon. Along with Argentina, other amazing places to target this particular fish are Norway and even some rivers in the UK give you a great chance of catching a Sea Trout although the much bigger fish can be found abroad.

SEA TROUT Fishing Methods

They’re normally targeted by using fly fishing methods. Casting different types of flys to rising fish is an extremely productive method with dry and sinking flys all accounting for many catches. Among the top flies are the Clouser Minnow, renowned for its versatility and ability to imitate small baitfish with its weighted eyes that provide a jigging action; the Deceiver, a streamer that excels in mimicking larger baitfish with its long, flowing materials; and the Surf Candy, which is highly effective in clear water due to its translucent and lifelike appearance. Additionally, the Woolly Bugger, a staple in any fly angler’s box, proves its worth with its ability to mimic a variety of prey, from small fish to leeches, depending on its color and size. Lastly, the Gurgler, a surface fly, offers a unique topwater experience, imitating struggling prey on the surface and provoking aggressive strikes from sea trout. These flies, with their distinct designs and actions, cater to the predatory instincts of sea trout across different environments and seasons, making them indispensable tools in the pursuit of this elusive game fish.

Bait fishing can also be used such as worms or maggots trotted down fast-flowing streams under a float often catching fish. Spinning with lures, including mepps spinners, is another great tactic to ensnare a stunning fish.

Contact us

Have you ever been Sea Trout fishing abroad? Is this a favourite species of yours that you just love to fish for? If it is, and you’re ready to experience true Sea Trout Fishing, you can contact our fly fishing manager, Peter Collingsworth, at or call 01603 407596 today.

Alternatively, visit our Sea Trout fishing trips page containing all our fishing holidays trips and vacations. You can also find our Sea Trout fishing videos here on our Youtube Channel.

Tight Lines,


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