Pearl Oyster (Pleurotus ostreatus) is a species of edible mushroom commonly found on dead or dying hardwood trees, or cultivated on substrates like straw and sawdust. It is recognized for its fan or oyster-shaped caps and white to grayish-brown color. In cooking, Pearl Oyster mushrooms are prized for their delicate flavor and tender texture, and can be used in dishes such as stir-fries, soups, sauces, and stuffings. They are also known for their medicinal benefits, including immune-boosting and anti-inflammatory effects, and potential to treat certain cancers and improve heart and liver health.