Brook trout once inhabited every cold water stream in the mid-Atlantic and northeast region of the United States, but populations have dramatically declined during the past 200 years. Wild trout need cold, clean fresh water, which you would find in a shaded stream, a stream that has many trees growing right by it. They also need a food source, aquatic insects (aquatic macroinvertebrates). These baby brook trout are about four months old and will be released into an approved stream as part of the Trout in the Classroom and Trout Grow on Trees programs. They love to eat, and we hope to soon feed them real insects!