The Trempolians were a alien civilization native to a homeworld located somewhere in the galaxy's Alpha or Beta Quadrants. They were humanoids with light-green skin, pointed ears, and clusters of what look like yellow spots on their arms, shoulders, legs, and stomachs.
Members of this race resided aboard the Federation starship USS Enterprise-D in the year 2364. They celebrated triakk while many of the rest of the crew observed Christmas. (TNG comic: "Spirit in the Sky!")