Fethry Duck

Fethry Duck is Donald's lively and rather odd cousin in DuckTales, voiced by Tom Kenny. He first appears in "The Depths of Cousin Fethry!" as caretaker of a McDuck Enterprises marine science station, where Huey and Dewey take him for a scientist. Years at the station have made him good at living underwater and talking with sea creatures, and the episode ends with him leaving to become a real scientist after he finds his pet krill Mitzi, grown huge by hydrothermal vents. In "Moonvasion!" he, Mitzi and Gladstone rescue Donald, Della and the kids and help Scrooge fight off the Moonlander invasion. He is at Webby's birthday party in "The Last Adventure!". Cousin Fethry was created as a "beatnik" in 1964 by comic creators Dick Kinney and Al Hubbard.