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In fact, in a harvest of two and a half tons of oysters, only three to four oysters produce what commercial buyers consider to be absolute perfect pearls.

In three to seven years, the oyster can produce a perfect pearl.

These pearls are not as valuable as natural pearls, but look exactly the same.

Many of these animals are prey to larger animals, including fish, such as striped bass, black drum and croakers.

An oyster reef can increase the surface area of a flat bottom 50-fold. They are protandric; during their first year, they spawn as males by releasing sperm into the water.

The many different types, colours and shapes of pearls depend on the natural pigment of the nacre, and the shape of the original irritant.

Pearl farmers can culture a pearl by placing a nucleus, usually a piece of polished mussel shell, inside the oyster.

Once the female is fertilized, she discharges millions of eggs into the water.