Hmm...I guess different parts of the country do things differently. See, here in Michigan and the other great lakes states they did in fact spray the area for much of the summer and fall this past year but we never were told to stay inside or not breath in the "chemicals". I recall a news report saying the spray was safe for your animals (cats, dogs, etc?) but I guess I assumed that the spray would be safe for fish.
...I mean, if it wasn't safe how many fish in the great lakes would have been killed from this? I don't know, but my fish haven't suffered. I guess it just depends on the area.