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

: Because they require clean, cool, and highly oxygenated water to survive, their presence often signals a healthy, unpolluted stream. : They are a primary food source for

Stoneflies undergo , which includes three stages: egg, nymph (or naiad), and adult. Stonefly | Aquatic, Nymphs, Predators | Britannica and highly oxygenated water to survive

: As nymphs, many act as "shredders," breaking down coarse organic matter like leaves, which fuels nutrient flow in freshwater food webs.