Oysters Imperial Spiny Oyster 3”+ clam Pinctada is a genus of

Pinctada is a genus of saltwater oysters

The Grinning Tun

This makes them no where near as dense and hard as a stony coral

not only adding to the apparent size

commonly known as lettuce coral or tan lettuce-leaf coral

Oysters Imperial Spiny Oyster 3”+ clam Pinctada is a genus ofPinctada is a genus of saltwater oysters, marine bivalve mollusks in the family Pteriidae, the pearl oysters. These oysters have a strong inner shell layer composed of nacre, also known as "mother of pearl". 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. Hammer Oysters and Pacific Spiny Oysters are not closely related to true oysters