What a curious misspelling. I suppose this kind of paint keeps the birds from sticking to the bottom of your boat.
Many "anti-fouling" paints ARE for the birds... There should be a sanctioning body for some product labels, like the BBB for business, which in this case could mean... Better Barnacled Bottoms. I've tried anti-foul paints that were supposed to be less harmful to the environment. In fact... this was true. It gave marine life a new place to live!