The natural habitat of the species is freshwater with about 12°C in summer. It is unclear whether its anadromy is a truly genetic adaptation or simply an opportunistic behavior. It seems that any stock of rainbow trout is capable of migrating, or at least adapting to seawater, if the need or opportunity arises. Adults feed upon fish eggs, minnow and other small fish (including other trout); young feed on small insects and crustaceans. Utilized fresh, smoked, canned and frozen; eaten steamed, fried, broiled, boiled, microwaved and baked (Ref. 9988). Rainbow trout is cultured in many countries and is often hatched and stocked into rivers and lake especially to attract recreational fishermen (Ref. 9988).