Their bright-colored skins were kept slick and wet as they breathed through it. This adaptation left grung with wide, sharp teeth-filled mouths. The evolution of grung gave them intelligence, opposable thumbs, and ingenuity, but took away their prehensile tongues, which were common among other amphibian races. Unlike frogs and toads, however, grung were incapable of long leaps. These creatures stood upright erect and moved about in quick, short hops. They had muscular forelimbs and their hands had opposable thumbs. Their torsos and heads were less amphibian and more humanoid. They resembled small humanoids with strong toad or frog-like legs that ends in webbed feet. Males were generally smaller than females.
Adult grungs usually stood at approximately 3 feet (0.91 meters).
