This is a very touching presentation made by Brian Skerry, photographer from National Geographics. His job is to shoot life above and below the waves, or as he says, both the horror and the magic of the ocean. 

It is really impressive the quality of the photos, and how much an image can tell. There are many photos of sharks as well, since Brian is facinated by them, as well as alarmed by the rate of decline in many shark species.
 
This story was taken from TED. Strongly recommended website they have very interesting talks on how to make the world a better place.


To be more precise, the purpose to this non for profit organization (TED) is to promote "ideas worth spreading" and you can find there a large amount of presentations, made by passionate people. The talks generally last 18 minutes, which is a good time to explain complex concepts and ideas, but without making it too long for time consuming for the viewer.