When grey seals become killers
What predator has been attacking porpoises? The animals have increasingly been found washed up on North Sea beaches bearing unusual bite marks. The specialists who have been addressing this question for the last few years have identified the culprit as grey seals, which have never been known to attack these kinds of animals before. They were given away by their DNA which was detected in the bite marks as Thierry Jauniaux and Mutien-Marie Garigliany both of whom are researchers at the Animal Pathology Laboratory of the University of Liege have shown. But the reasons remain to be determined.