Reegrunions were a humanoid species with grey skin, ridges on the forehead and barbels at the side of the mouth and beneath the lower lip.
Two Reegrunions were among the miners transported aboard the USS Enterprise-D from Harod IV in 2368. (TNG: "The Perfect Mate")
Plix Tixiplik was a Reegrunion who was listed on a wanted poster in Constable Odo's security office aboard Deep Space 9 in 2370. Nog thought the name was odd. (DS9: "Sanctuary")
The identification of the species was visually made by Nog from Tixiplik's wanted poster, which was created from a continuity polaroid of the miner who appeared in "The Perfect Mate".