In the face of danger, what's a spineless animal to do? This video segment introduces the concept of camouflage -- how animals achieve it and how this form of disguise benefits both predators and prey. Footage from NOVA: "Animal...

Video showing how a poisonous puffer fish protects itself from an otter's attack by self-inflating. Watch as the otter struggles with what looks like a small beach ball, eventually giving up. (Length: 1 min. 24 sec.)