In Florida you can go snorkeling in water that is clear enough to take pictures. That's where most of these pictures were taken. I didn't use my usual DSLR for these though. Instead, I borrowed a friend's point-and-shoot that had a waterproof case.
On of these shots has the silhouette of a shark. It was a bit nerve-wracking floating in the water trying to get a good picture of a shark. The shark also seemed a lot closer than it appears in this picture. I suppose one might think that about any shark that was within view.
The last three shots are from an aquarium. It's not easy finding a clean patch of glass in aquariums. They're usually covered with fingerprints.