mushroom is an edible mushroom which was originated from Germany during the World War I. Pleurotus ostreatus is commonly known as Oyster Shelf, Tree Oyster, Tamogitake and Straw Mushroom, is a mushroom very similar to Pleurotus pulmonarius with some differences. The cap of Oyster mushroom are broad and fan or oyster shape. Pleurotus ostreatus prefer temperate and sub-tropical climate. This fungi grows on dead hardwood trees.