How can this not be swimming relevant? Go straight to photojojo.com and see the 15 tips: Shoot in safe waters, have enough light, stay at the surface, get close, get acrobatic, make bubbles, bring in props, practice your shot before you take it, wear light clothing, shoot up or across, and 5 more.
(A relevant and quite brilliant photo, me thinks, courtesy of Mick Gleissner)
