The study area of the Northern Aegean Dolphin Project is an area of 1,517 sq.mi., that covers a big part of the National Marine Park of Alonnisos, Northern Sporades (NMPANS) and extends towards the SE boundaries of the Park, towards the island of Skopelos (see map below). The northwestern boundary of the study area is characterized by a steep continental shelf and depths of almost 1,500 m.