Denobulan

Denobulans are a Humanoid species that hail from the planet of Denobula of the Denobula Triaxa system. Denobulans only requires 144 hours of sleep per year although some Denobulans, such as Doctor Phlox of the Enterprise NX-01, can sleep as little as 48 hours per year. It is customary for adult Denobulans to have three spouses each. Denobulans also have ridges running their forehead, cheeks, and spine.