Can't. Oysters inside brown like shit is the oyster's digestive system and feces, oysters are a high-protein marine shellfish creatures, so can not be eaten. Oysters are a common seafood, the scientific name is oyster, also known as sea oysters, oysters are a kind of mollusks, belonging to a kind of bivalve clams, there are two shells, one is small and flat, and the other is large and bulging. Oyster meat for food, but also can be extracted oyster oil, high nutritional value, containing a variety of amino acids, glycogen, a large number of active trace elements and small molecular compounds.