Ischia Dolphin Project. During a sperm whale traking, while recording the blows of a surfacing whale, another individual jump out of the water. Sperm whale’s residency and movements in the water of Ischia have been regularly investigated over a 10 years period (2003–2014). A total of 71 individuals were photo-identified on the base of their natural marks on the fluke. This area is relevant for all the species’ ages classes, with social units composed by females and their immature, lone males (bulls), and variable aggregations of immature males.