King oyster mushrooms are one of the biggest types of edible mushrooms. The mushroom goes by the scientific name of Pleurotus eryngii and it is native to Europe, the Middle East, and North Africa, also grown in many parts of China.
They have a striking appearance and are very thick in shape, giving them an extremely chewy and spongy texture — a little bit like squid. The mushroom has a good shelf life and is cultivated widely. It has little flavor or aroma when raw. When cooked, it develops typical mushroom flavors with a texture similar to that of abalone, therefore sometime you will heard people calling them Abalone Mushrooms.
(source: https://en.wikipedia.org/wiki/Pleurotus_eryngii)