1 First, we clean the shells of oysters, and clean the algae and sediment with a small brush. Oyster 2 then opens its shell with a knife. Oyster 3 At this time, we will find a mass of black internal organs in it, which is what we want to clean up. Oyster 4 We carefully cut the muscles around the internal organs with a knife, cut them open, and washed the black things inside with water. Oyster 5 Finally, we removed the internal organs and washed the oysters.