If you're diving in one of the world's temperate oceans, don't be alarmed if you find yourself face to face - or face to maw - with a basking shark. The second-largest shark in the world, which can reach up to 10m length, the basking shark is also known as the megamouth shark. Despite its alarming appearance, this breathtaking shark is a harmless plankton eater and poses no threat to humans..., as far as you don't accidentally get inside it!

More information:

cnn.com/bizarre-basking-shark-reappears