oysters make shells
She was attacked by an unkown sea creature it could a prehistoric creatre
The pearls aren't in the Sea of Monsters. They are in the first book.
Bivalve crustaceans such as oysters have pearls.
actually sharks, whales and swordfish or its dugons
Sea urchins do not produce pearls in the same way that oysters do. While oysters create pearls from irritants by secreting layers of nacre, sea urchins have a different defense mechanism. They can form structures called "urchin pearls," which are calcified deposits, but these are not true pearls and are generally not valued like those from mollusks. Instead, sea urchin pearls are often irregular and not sought after in jewelry.
The places to purchase South Sea pearls online are many and varied. A good place to start would be Pearl Paradise, Raw Pearls, Premium Pearls and Pearl Gallery.
Imitation pearls made from sea shells; very popular on Okinawa.
Oyster
clams
oyster
clams
Oysters, but very very rarely they are found in clams.