Mysterious 'creature' spotted in UK port

NineMSN reports that a strange creature was photographed by satellite, and visible on Google Earth, swimming in the Albert dock in Merseyside, near Liverpool, England. I must contact the local marine biologist - the image appears to show some sort of sea creature with a curved body, pointed snout and pectoral fins on either side of its body. Speculation is it might be a shark, but it's unusual for tropical island sharks to be found in this area.