Sungai Pakning is a sub-district and is also the capital of Bukit Batu District, Bengkalis Regency, which has an area of 34 km2. The Pakning River is widely used for tourism, ship transportation, ship landings and settlements which have the potential to disrupt the balance of the aquatic ecosystem. The aim of this research is to determine the structure of the macrozoobenthos community and t…