The brown trout (Salmo trutta morpha fario and S. trutta morpha lacustris) and the sea trout (S. trutta morpha trutta) are fish of the same species.

They are distinguished chiefly by the fact that the brown trout is largely a freshwater fish, while the sea trout shows anadromous reproduction, migrating to the oceans for much of its life and returning to freshwater only to spawn.[2] Sea trout in the UK and Ireland have many regional names including sewin (Wales), finnock (Scotland), peal (West Country), mort (North West England) and white trout (Ireland).

Characteristics

The brown trout is a medium-sized fish, growing to 20 kg or more in some localities although in many smaller rivers a mature weight of 1 kg (2 lb) or less is common. The spawning behaviour of brown trout is similar to that of the closely related Atlantic salmon. A typical female produces about 2,000 eggs per kilogram (900 eggs per pound) of body weight at spawning. On Sept. 11, 2009, a 41.45 lb (18.80 kg) Brown trout was caught by Tom Healy in the Manistee river system in Michigan, setting a new state record and possibly, a new world record for Brown trout. As of late December 2009, the fish captured by Mr. Healy was confirmed by both the International Game Fish Association and the Fresh Water Fishing Hall of Fame, as the new all tackle world record for the species. This fish now supplants the former world record from the Little Red River in Arkansas.

Brown trout can live to ages of 20 years. But as with the Atlantic salmon, there is a high proportion of death of anadromous males after spawning and probably fewer than 20% of anadromous female kelts recover from spawning. The migratory forms grow to significantly larger sizes for their age due to abundant forage fish in the waters they spend most of their lives. Brown trout are active both by day and by night and are opportunistic feeders. While in fresh water, the diet will frequently include invertebrates from the streambed, other fish, frogs, mice, birds, and insects flying near the water's surface. The high dietary reliance upon insect larvae, pupae, nymphs and adults is what allows trout to be a favoured target for fly fishing. Sea trout are especially fished for at night using wet flies.

Diet

Young brown trout feed on insects and other invertebrates such as shrimp, flies, caddis, stonefly, mayfly, etc. Both larvae and adults are taken and the fish will eat whatever local insect life is abundant at the time. Larger fish are active predators of fish including young brown trout, suckers, sculpins, shad, whitefish and rainbow trout. Larger brown trout will also feed on small terrestrial animals that fall into the water such as baby birds falling from overhanging nests, or even swimming mice/voles. Brown trout sometimes do not actively feed until the late afternoon or early evening but when the weather is cool they will feed during the day as well. The largest browns feed under cover of darkness.

Signature Destinations - Tierra del Fuego
	Estancia Despedida The pools of Estancia Despedida are dead-center on the river border shared with Estancia Maria Behety. Despedida Lodge prides itself on access to many of the finest pools on the Rio Grande. >>read more
	Estancia Maria Behety From its promontory nearly 30 kilometers from the estancia entrance, Estancia Maria Behety Lodge is within minutes of more than 100 of the finest pools on the river and their location alone ensures one of the top trophy trout trips on the planet. >>read more
	La Villa de EMB La Villa, at the entrance to the 275,000-acre Estancia Maria Behety, was once regarded as among the most beautiful ranch mansions in all of South America. Its guests brought fame to the Rio Grande, and their stories and laughter filled the villa until it was gutted by fire in the late 70's. >>read more