Dolphins off the coast of Altis/Lemnos: http://www.youtube.com/watch?v=3hL1CFbLNP4
The included image is also from the Stratis/Atlis/Lemnos area.
Dolphin behavior: would include jumping on the bow wake of boats only if a dolphin nearby noticed the boat and decided to come over, interaction with divers and swimming around in a pod with other dolphins.