ABSTRACT Information on the abundance and diversity of meiofauna as bioindicator in Indonesia’s littoral zone is still similarly, the abundance and diversity of meiofauna in Riau Province, especially in Bengkalis Island. This research aimed to find out the abundance and diversity of meiofauna as bioindicator in Selat Baru and Pambang Pesisir of Bengkalis Island Riau Province, where in both l…