Ziphius does not dive, it floats. The development of a submersible drone would require at least one more motor and a way to deal with video streaming from underwater (which is not straight forward). We are thinking about how we can make it dive and already have some ideas that we will follow up on after the launch of Ziphius.
However, Ziphius does have a camera whose position is controlled by the mobile device (smartphone or tablet). When tilted downwards you can see what´s underwater and take pictures and videos. Besides that, it is really fun to watch and experience it surfing the waves or simply racing at the lake.