Wonderful creatures hide in Earth's seas, rivers and lakes, but specialist equipment enables their secrets to be shared with viewers.
What lurks beneath the water's surface could leave you fighting for your life. Meet six animals inflicting pain and changing lives forever.
The minuscule itchy grub, the unique platypus and the huge water buffalo have little in common, apart from the pain they can inflict.
Stretching from the North Pole to the tropics, life in Asia is tough. To survive, Asia's animals have developed into some of the most ferocious – polar bears, grizzly bears, cobras and giant hornets.
Whether known predators or presumed friends, an animal that turns can kill a human – or eat them alive – in moments.