David Gallo shows jaw-dropping footage of amazing sea creatures, including a shape-shifting cuttlefish, a pair of fighting squid, and a mesmerizing gallery of bioluminescent fish that light up the blackest depths of the ocean. He focuses on the work of two scientists: Edith Widder at the Ocean Research & Conservation Association, and Roger Hanlon at the Marine Biological Lab.
http://www.ted.com/index.php
I recommend downloading the 480p video and watching that version
http://ted.streamguys.net/ted_gallo_d_2007_480.mp4
thanks to bob for the link