Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
Large invertebrate organisms visible to the naked eye, such as aquatic insects, crustaceans, and mollusks, commonly used as bioindicators of water quality and ecosystem health in streams.