Fig. 2From: Meeting the quest for spatial efficiency: progress and prospects of extensive aquaculture within offshore wind farmsMethods to cultivate mussels and seaweed in a suspended or floating design. a shows a raft system where mussel collectors are attached vertically from a wooden frame. b A horizontally installed longline floating on the surface. The mussel collectors are attached below the water surface vertically to the longline. c A floating ring system for the cultivation of seaweed at harvest time (Buck and Buchholz 2004)Back to article page