by a tiny grain of sand actually, they're not. the PEARLS are formed by a tiny grain of sand.
oyster shells
Yes
to help with their digestion.
The oyster's shell provides protection from predators. Oysters do not need to shed their shell because the eat and expel waste products buy opening their shells and pumping water in and out with hairlike structures call cilia.
An oyster - bi (stand for two) and valves (stands for shells) - two shelled animals.
Snail,oyster,Dentalium,Chiton
Oysters and mussels do not shed their shells. They are bivalve molluscs and their shells grow larger with age.
Sand fleas are small creatures which live on beaches and feed on tidal litter. They are unrelated to human fleas and would not survive for very long on the human body or in human clothes. They are only named sand "fleas" because they jump.
Mother-of-Pearl is found in Oyster shells
feed them oyster shells
one will wait 5 ounces