Got round about a hundred thousand dollars going spare? Then you'll be wanting a custom built shark/dolphin/killer whale sub/boat Seabreacher
Tony Stark style daredevils "flying" over, under and through the water (SLYT) This video (warning: annoying music) gets off to a slow start, but then the air ballet begins and the people turn into cormorants and dolphins. Enjoy!
So, uh, apparently Jet Boards are a thing. Maybe you knew this? I did not. At first I just thought that video was kinda neat, and the idea was interesting. Then I looked at their website and found a ton of amazing photos, a lot more SCIENCE! explanations of stuff than I would have expected, and finally this promovideo which features both an endearingly cheesy original themesong, as well as lightning and explosions (GIF!). Soooooooooo yeah. Jet Boards. Apparently invented as early as 1965. Pretty sweet.
Introducing the Zapata Flyboard, which is being described as a "dolphin jetpack." Designed by Franky Zapata, the French jet-skiing champion and founder of Zapata Racing, Gizmag says of the $6,600 leisure product: "Aquaman meets Iron Man." [more inside]