They create their own rafts of bamboo and styrofoam to float. On the bamboo sticks they knot rope with a basket attached to it. These baskets go into the water while they are all hanging underneath the raft on the pieces of rope. In these baskets, they raise shellfish and mostly oysters. After a while the baskets are so heavy that the raft starts to sink. That’s the moment when the owner inhales the baskets and starts to detach the shells from it.