shells that are usually grey, blue, or brown in color irregular, fan-shaped shells the top of the shell has a pointed, curved shape the bottom of the shell is flat the shells have concentric rings they are usually found in shallow waters
oysters which has shells that are usually grey, blue, or brown in color oysters which has irregular, fan-shaped shells oysters which has the top of the shell has a pointed, curved shape oysters which has the bottom of the shell is flat oysters which has the shells have concentric rings oysters which has they are usually found in shallow waters