A Saltwater Crocodile (Crocodylus porosus) underwater... Crikey.  Images of these creatures underwater are extremely rare for 2 reasons. Firstly these crocodiles are rarely found in areas where the waters visibility is clear enough to see them. And secondly, well there an apex predator that's survived for millions of years due to their extremely effective hunting skills (Not a creature you'd usually hop in the water with). This 4m male was resting on the bottom, having a post feed rest and only surfacing periodically to breathe allowing for this incredible encounter.