The present invention solves the problem of flipping floating oyster cages by using a rotating system that lifts one side of the oyster cage while depressing the other side. The resulting rotation torque is able to invert the oyster cage to allow the cage and the oysters to temporarily dry out as a way of controlling marine biofouling. The invention may be mounted on a boat or between two boats and can sequentially flip the oyster cages along an anchored string.