Oysters have been existing in the world for more than 180 million years ago. They are one of the oldest marine organisms living today. There are historical evidences showing that it was one of the staple food consumed by Neolithic man, lived on earth five thousand years ago, in large quantities. The word “ostracise” was derived from the Greek word “astrakeon”. Aristotle in 320 B. C. investigated the regenerative process of oysters and described in his treatise “Historia Animalium”. The Greeks used to serve oyster meat in wine and shells as ballot papers. The Athenians also used oyster shells as ballot papers to vote to banish unpopular citizens.