Down at 20 metres on the bottom of the ocean floor Michelle Gilham has captured this swimmer relaxing and taking in a beautiful Koh Tao day. Perfect visibility, beautiful sunlight, and  being in the right place at the right time make this a great shot.  But it highlights another reason to remember when diving always look up as well, underwater is a 3D space and you never know what might be there, with it being Whaleshark season here on Koh To you just don't want to miss out. Happy video hunting...