As apex predators in their aquatic ecosystems, Native Idaho Trout primarily feed on insects, smaller fish, crustaceans, and other aquatic organisms. Their role is critical in maintaining the balance of their habitats; they help regulate the populations of smaller fish and aquatic invertebrates. Spawning occurs in the spring, when trout migrate to shallow streams with gravel beds to lay their eggs. The ecological health of these waters directly affects their populations, with factors such as water temperature, pollution, and habitat disruption posing significant risks. Conservation efforts are vital to preserving these keystone species, which are indicators of the ecological health of Idaho's freshwater systems.