GoPro action cams are wonderful tools to use to capture all the action outdoors. Thanks to the Dome Port, you can take your GoPro HERO underwater. You get a waterproof shell and floating handheld to put your camera to better use. The product is designed to let you capture images above and below the water simultaneously (50/50 view).
The Dome Port has a semi-hemispherical acrylic dome and works with HERO3+ and HERO4 cameras. The floating handle makes your life easier. You can get yours for under $110.