Derasa Clam Shell (3”-4”) Indian Ocean Blue Sea Fan (10”) on

Blue Sea Fan (10”) on Mushroom Coral Base

Pearl oysters are not closely related to either the edible oysters of family Ostreidae or the freshwater pearl mussels of the families Unionidae and Margaritiferidae

but there are also cold water species

They are thick and elongated

This species is a soft coral but with a unique

Derasa Clam Shell (3”-4”) Indian Ocean Blue Sea Fan (10”) onThe Derasa Clam (Tridacna derasa) is the second largest clam of the Tridacna clams. It is also one of the easier clams to care for. This clam can grow to about 20 inches in captivity. They typically have a brown gold coloration with white stripes or spots. It may also have bright blue along the outline of the mantel.