 Some time later the wall was covered with spat coming spontaneously from the sea which gave 2000 baby oysters per square metre.Commonly farmed food oysters include the Eastern oyster "Crassostrea virginica", the Pacific oyster "Crassostrea gigas", Belon oyster "Ostrea edulis", the Sydney rock oyster "Saccostrea glomerata", and the Southern mud oyster "Ostrea angasi".Oysters naturally grow in estuarine bodies of brackish water.