“HUBUNGAN KEPADATAN SIPUT (Drupella) DENGAN KONDISI EKOSISTEM TERUMBU KARANG DI PERAIRAN PULAU SEMUJUR PROVINSI KEPULAUAN BANGKA BELITUNG: THE RELATIONSHIP BETWEEN DRUPELLA SNAIL DENSITY AND THE CONDITION OF THE CORAL REEF ECOSYSTEM IN THE WATERS OF SEMUJUR ISLAND, PROVINCE OF BANGKA BELITUNG ISLANDS”, AKU, vol. 13, no. 2, pp. 152–161, Oct. 2019, doi: 10.33019/akuatik.v13i2.1498.