One of the many things that's incredible about David Attenborough's documentaries is just how up close and personal some of the shots are.
In a clip for the forthcoming Blue Planet II, you get right up close to spider crabs shedding their shells and marching along the surface in Australia's Mornington Peninsula. Alex Vail, a camera operator on the documentary, explained in a blog post how he dived to the surface to get the shot.
Image: http://mashable.com
