Check this out Rubini...has all different species of dolphin with patterns and what waters they are found in around the world. You just click on dolphin you want to learn about and there is Range Map towards bottom right. We could get really geeky with this mod (if we haven't already)
http://www.acsonline.org/factpack/map-dolphins.html
Achtung- I'll have it out soon within next day or so.