Denobulan

Denobulans are a spacefaring humanoid species which hails from Denobula.

Biology
Denobulans are humanoids with bony ridges on their heads and spinal columns. They have elongated tongues and flexible faces, which allow them to make exaggerated expressions, such as an inhumanly wide smile. Most notably, they can inflate their faces like a pufferfish when frightened. They can also climb steep vertical surfaces with their hands and feet, without using any special equipment.

Culture and society
Denobulans are polygamous.

Appearances

 * Star Trek: Enterprise (2001 - 2005)