Simyastos were, on average, taller than Humans and other humanoids; even a female Simyasto shorter than 1.68 meters was atypically small. They possessed a number of distinctive facial features, including vestigial tentacles around the jawlines similar to those possessed by Sith purebloods and dark-colored, vestigial horns above their eyes. The eyes themselves, uniformly dark brown, were set deep below heavy brows. Simyastos had dark teal skin.