Researchers with the Archipelagos Institute of Marine Conservation recorded the sighting between the Greek islands of Ikaria and Chios. Risso's Dolphin is one of the least-studied dolphin species in Greek waters.

Off the coasts of Fournoi and Ikaria, in the North Aegean sea, a trove of ancient shipwrecks is rewriting what we know about Aegean trade route

The two whales were recorded in one of the deepest areas of the Aegean near Ikaria by the Archipelagos Institute of Marine Conservation crew.