Watcher Tzudan was a male Uk'lean working at the Preserve on the planet Morassia. He was one of the three Watchers responsible for handling the second shipment of animals for the Preserve and the person who brought the mistagged Akaana boar to the attention of [[Doctor Vi Hyunh-Foertsch. He did not go to consultant Iydia because he disliked the latter's methods of "drugging" and "borrowing" animals "in the interests of science". He also could not believe that Iydia allowed for the mistagging in the first place.