The Zadarian dolphin was a species of dolphin native to the oceans of Zadar IV.

In the 24th century, Starfleet oceanographer Lieutenant Harry Bernard, Sr. was stationed on Zadar IV with his son Harry Jr. They lived on the beach and Harry Jr. often saw Zadarian dolphins playing in the ocean. They would later be the inspiration for his first attempt at sculpting. (TNG: "When The Bough Breaks")