There is no doubt that smartphone cameras these days are getting better at capturing professional-grade pictures. You can record a vlog, a short movie, or perhaps an underwater documentary about life at sea.
The AxisGO by AquTech is a waterproof housing for some iPhone models that allow for photography and videography up to 33 feet (10 meters) deep under the water surface.
Made with a combination of stainless steel, aluminum, and polycarbonate, the housing is meant to protect your iPhone from the immense outside pressure while keeping water out. And of course, the touchscreen and side button will work when you dive.