These creatures are always intriguing...
They are not particularly skittish around divers, in fact this large cuttlefish was posing for a long time. Although I understand that when they raise their tentacles like this, they are feeling threatened (but he didn't move or flee). (Indonesia, 2006, Nikon D2Xs)
The 2 Caribbean squid were making a nest in a coral head, and would change colors as they moved close to the reef. Their eyes look like tin foil when the strobes reflect in them, no photoshopping there! (Taken at Little Cayman, in 2002 with Olympus 3030Z, 3.1 MP)
This tiny Flamboyant Cuttlefish was about the size of your thumb, and was moving across the volcanic sand, seemingly unaffected by our strobes. Videos of these guys show the coloration on their abdomen as moving stripes, undulating as they swim !! (Indonesia, 2006, Nikon D2Xs)