The Aldebaran shellmouth was an alien lifeform from the Aldebaran star system known for always keeping its mouth closed tightly.
Dr. Leonard McCoy said that Spock was as tight-lipped as an Aldebaran shellmouth due to his lack of willingness to discuss his pon farr. (TOS: "Amok Time")
External link[]
- Aldebaran shellmouth at Memory Beta, the wiki for licensed Star Trek works