From Keith Roy
You report that seals have been recorded attacking porpoises, and the issue immediately brings one idea to mind (29 November, p 7).
Porpoises and seals share almost identical diets and we are currently wiping out their food supply. Is it any wonder they are fighting over a dwindling resource that is essential to both?
It’s probably a good thing that neither of them have the means to attack fishing boats!
Stockport, UK
