Fish farms are some of the worst pollutants in the ocean. Remote stretches of Patagonia are becoming cess pools of salmon shit as a result of salmon farming.

Don't get me wrong, there are sustainable ways to farm fish and other seafood, but most are a complete ecological disaster. Even something as seemingly harmless as mussel farming has detrimental impacts on the local ocean ecology, as surprise, surprise mussels produce waste and accumulating it in one place is not a good thing.