Young seals seem to enjoy sneaking up behind divers, giving their fins a quick pull, then making a quick 180 and away in a flash. I imagine them laughing as they make their exit.

This can be highly entertaining, but rather frustrating for a photographer repeatedly missing close shots. To take advantage of this behaviour. I made myself heavy, rested my tank on the seabed, gently wafted my feet above, waiting for a seal to take the lure.