Breeding males, which show a rust-red breast, vigorously defend eggs which are laid in shallow depressions. It feeds mainly on small fishes and invertebrates and reaches a length of nearly a foot and a record weight of 4 pounds 12 ounces. Brown Trout Salmo trutta Introduced from Europe in 1883, the brown trout is now widely established in Northeastern and Western United States. It is more difficult to catch than brook of rainbow trout and has a reputation for being able to resist environmental changes. Brown trout have attained a weight of 35 pounds.
Food is primarly insects, other invertebrates, and smaller fishes.
Rainbow Trout Oncorhynchus Mykiss Introduced widely throughout the United States, the rainbow had a natural range from the mountains in northern Mexico through the Pacific drainage in the Western United States to the Aleutian Islands. The rainbow has been introduced, with varying degrees of success into each State in the Mountain-Prairie Region. A great favorite with the angler, it may be distinguished from other native species by the rosy lateral band that extends from the gill cover to the base of the tail fin and the numerous black dots that pepper the greenish-golden back, sides, and upper fins. Rainbows that go to sea and return to freshwater are called steelheads. The rainbow can reach a weight of more than 10 pounds and feeds on small fishes and invertebrates.