Yes, there is considerable concern about the pesticides and the abundance of shellfish like krill in particular—which is food for so many parts of the food web—being impacted, with no study whatsoever being done on it.
Our concern is also the likelihood that additional chemicals will be brought into the mix, as they have been unable, here in B.C., to control sea lice with the mechanical equipment they have brought in. Since the drugs have failed, the next thing is to move on to the next level of toxic drugs. There are severe consequences, particularly for shellfish, if such drugs are used here on this coast. Again, those haven't been studied either. It's critical that we get a grip on this right away.