Aquaculture, or aquafarming, is the farming of fish, shellfish or algea for commercial purposes. Aquaculture causes environmental problems since part of the fish feed is left unused, and together with the fecal waste causes eutrophication (see eutrophication). Mussel farming, on the other hand, can be beneficial since mussels filtrate the water, which reduces particles and makes the water clearer. This method is however not cost-beneficial in the Baltic since the sedimentation from the farming, along with the oxygen consumption of the mussels, takes out the effects of the filtration.

Picture 1 and 2: Mussel farming, Åland


Lundberg, C. et al (2012). Undervattensmiljö i Norra Östersjön – Viktigt att tänka på vid havsnära planering. Närings-, trafik- och miljöcentralen, Helsingfors.