Marine biologist Roger Hanlon is king of the color-changing cephalopods. I've talked about him here before. In this video, narrated by NPR's Robert Krulwich, Hanlon demonstrates how much fun his job really is.
Via Robert Krulwich's blog, which has more background on the camouflage gymnastics that cephalopods are capable of.
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.