Brown Trout 

. 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 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.

Rainbow Trout

 

Rainbow trout (Oncorhynchus mykiss) is a Pacific salmonid species that was first brought to Britain in 1884. Fast-growing and tolerant of crowding in captivity, they are now widely used around the world for fish farming and restocking of angling fisheries. Rainbow trout have a prominently spotted tail and often a wide band of red, pink or mauve along the flanks.