"Since I'm trying to catch sharks, I don't have any problem with that. They make good eating. Look out," he warns, stepping a few paces back, before changing shape: the old-man-shape disappearing into a dark cloud of mist that expands and reforms into a large, black-scaled, spiney creature that looks half dragon and half man. He drops to all fours, peers around the beach-- he still has one bad eye, the same one as in his other form-- and then picks his spot and starts to dig.

Having claws, and hands big enough to stay on top of shifting sand, makes it go faster than if he were digging with human-sized hands.