Do you know anything about the hordes of sea lice they are producing?? They are causing all kinds of problems in the Ocean .. Google it if you don't believe me.
    Andy is right on the money on this one, and well we rarely see eye to eye LOL :)
Here I saved you the trouble :
 http://www.farmedanddangerous.org/salmon-farming-problems/environmental-impacts/sea-lice/