In the Mediterranean, Common Dolphins are found in both pelagic and neritic environments, occasionally sharing the former with Striped Dolphins (Stenella coeruleoalba) and the latter with Common Bottlenose Dolphins (Tursiops truncates) (Bearzi et al. 2003). Mixed-species groups of Common, Striped and Risso?s Dolphins (Grampus griseus) have been consistently observed in the pelagic waters of the Gulf of Corinth, Greece (Frantzis and Herzing 2002). Mediterranean Common Dolphins are typically found in groups of 50?70 animals, with larger aggregations occasionally recorded. In the eastern Ionian Sea coastal waters, however, groups rarely include more than 15 individuals, and groups greater than 40 have not been observed (Bearzi et al. 2003).