Steelhead also tend to be more silvery than the freshwater rainbow form.Lake and stream dwellers tend to be lighter as well.River dwelling rainbow trout are generally darker and more brilliant.

• 刚头相对淡水的虹鳟来说体色更偏于银白，生活在湖泊和溪流中虹鳟的颜色要浅些，而生活在河中的体色通常深些，也更鲜艳。