Trout is a freshwater fish that only lives in cold water of 1 level quality. It's flesh is firm and chewy.
trout has no poison, and it taste sweet. Because of its color is like the color of inner part of pine tree, it was named 'Songeo'('Song' in Korean means 'pine' of pine tree. (Donguibogam)
The ingredients of trout include 21.2% of protein and 6.6% of fat. Protein is rich, and fat is just right. It's eggs have protein up to 40% and 26% of fat. Also, much DHA is contained. 
It has excellent effect in improving brain functions of children and preventing dimentia of old people with much contained DHA(unsaturated fatty acid).
It is a only lives in cold water under 10  of 1 level quality. It's one of the most love fish in the States, Canada, Japan, France, Germany, Italy, and United Kingdom as well as in Korea.
Trout from the eastern sea area of Gangwon-do is the best in nation. It is edible all around the year. It prevents arteriosclerosis, hypertensive, and diabetes. Also it's a nucleic acid food that is effective for beauty and prevents aging of skin. It's loved by epicures.