While taking a stroll on Nimmo's pier last week, I spotted a group of 5 or 6 large fish swimming just off the edge of the pier heading in the direction the docks. Each was about 1.5 m - 2m long and swimming maybe 2 m below the surface. They were quite unlike any fish I had seen around the docks before and while I originally thought that they must be very large Grey Mullet I now suspect that it could have been a school of Harbour Porpoises. What else could they be?