A family in Wales is farming in the ocean. On suspended ropes, they farm seaweed, mussels, oysters, and scallops. There are no nets around the area, so wildlife is free to enter and leave the area.
As an added benefit, this method creates and exclusion zone for trawling: creating wildlife safe-havens.
📰 https://www.positive.news/environment/wales-underwater-farming-revolution/