Just about everything has an organic counterpart. Except seafood.
In its simplest form, the problem is that humans are much more adept at regulating conditions on land. They're able to take steps that keep pesticides off of agricultural crops, or keep beef cows from wandering away from organically certified pastures.
In the wide-open depths of the ocean, however, the rules are different. Man is just a visitor, and has little or no mastery over what goes on. Aquatic "farms