Aquaculture of sea sponges is when people farm different kinds of sea sponges in the ocean. To do this, people put sea sponges in special structures in the ocean that provide a safe environment for the sponges to grow. After the sponges are grown, people can harvest them and sell them for things like aquariums or decorations. This helps to keep ocean ecosystems healthy, because it prevents people from having to take the sponges directly from the wild.