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Pearl oysters are not closely related to true oysters, being members of a distinct family, the feathered oysters (Pteriidae).
Both cultured pearls and natural pearls can be extracted from pearl oysters, though other molluscs, such as the freshwater mussels, also yield pearls of commercial value.
The hard surfaces of oyster shells and the nooks between the shells provide places where a host of small animals can live.
These pearls are not as valuable as natural pearls, but look exactly the same.Examples include: Because of its good flavor, it commands high prices.Oysters are filter feeders, drawing water in over their gills through the beating of cilia.The largest pearl-bearing oyster is the marine Pinctada maxima, which is roughly the size of a dinner plate.Not all individual oysters produce pearls naturally.