Stonefly

: They are a primary food source for fish, particularly game fish like trout and bass, and are frequently modeled for artificial flies used in fly fishing. Life Cycle and Behavior

Stoneflies are renowned for their sensitivity to water quality, making them "sentinel" species for environmental changes. Stonefly

Stoneflies undergo , which includes three stages: egg, nymph (or naiad), and adult. Stonefly | Aquatic, Nymphs, Predators | Britannica : They are a primary food source for