This research was conducted in October 2017 by taking samples from Tanjung Berlian and Gading Sari coastal waters of Kundur Island, Karimun Regency, Kepulauan Riau Province. This study aims to analyze the heavy metal content of Cu, Cr and Zn on C. Montagnei, to analyze the relationship of heavy metal content with snail size, to evaluate the level of pollution status of Kundur Island waters and …