Great Fotos Murat. Looks very tasty!!! About Mahi they always approach at the surface and are usually attracted by the float. Like amberjacks you usually spot them coming up from a dive in midwater. The ones I have shot in the mediterranean I always have found circling around the float. Sometimes in summer when you stop the boat and turn off motor you find them underneath as soon as you dive. Personally I think its because they are attracted by the whiteness of the hull.