Domar is the High Tribune of the underwater Aquans on Argo in The Ambergris Element, a leader who distrusts air-breathers and orders the transformed Kirk and Spock cast out.
Domar appears in the Animated Series episode The Ambergris Element. He heads the tribunal that rules the Aquans, a water-breathing people living in a city beneath the sea of the planet Argo, whose land sank in great quakes long before.
The Aquans have changed Kirk and Spock into water-breathers after an accident. Domar sees them as spies of the feared air-breathers and holds firmly to the ordainments, the laws that forbid contact with the surface and visits to the ancient ruins.
The younger Aquans, led by Rila, defy him to help the two officers find the old records of the mutation process and capture the venom of a sur-snake for the cure. After Kirk warns the city of a coming quake and it is saved, Domar accepts that the old laws must change.