Marine Wildlife Encyclopedia
Black-lip Pearl Oyster Pinctada margaritifera
Black-lip pearl oysters begin life as a male before changing into a female two or three years later. Females produce millions of eggs, which are fertilized randomly and externally by the males’ sperm, before hatching into free-swimming larvae. The mobile larvae pass through various larval stages for about a month before eventually settling on the seafloor, after metamorphosing into the sessile (immobile) adult form. The black-lip pearl oyster is famous and much sought-after because it occasionally produces prized black pearls.