AbstrackThis study aimed to assess the relationship between marine water qualities in bivalve fishing ground on easter part of Semarang coastal water. The result of study shows that the waters quality on those areas is still available for marine organism life. The water quality of dissolved oxygen between 5,2 ppm, water temperature 29,4 o C,7 ppt, pH 7,[1][2][3][4][5][6][7]8, turbidity 20,5 NTU, and current velocity 0,55 (Anadara granosa A. pilula, A. Gubernaculum, A. Inaequivalvis, Pharella javanica, Paphia undulate, Marcia hiantina, Harvella plicataria, Mactra violacea dan Placuna placenta)