A Federation-era planet remembered as the workplace of the brilliant engineer Dr Sevrin before his dismissal, and as the home of the cruel experimenter Zora.
Tiburon is mentioned in two Original Series episodes from the third season. In The Way to Eden, Spock's records show that Dr Sevrin was a noted research engineer there, working in acoustics, communications and electronics, until he was dismissed from his post and began the movement that rejected technological society. He and his young followers later steal a space cruiser to search for the planet Eden, and Sevrin uses his knowledge of sound against the Enterprise crew.
In The Savage Curtain the Excalbians call up a figure named Zora, who is said to have carried out experiments on the body chemistry of subject tribes on Tiburon. She is one of the four figures chosen to stand for evil in the contest staged for Kirk and Spock.
The planet has never been shown.