penguin boy will morph from his puppy dark colors into primary dark, charcoal with white leading from the lower half of his muzzle, down his chest, underbelly, and underside of his tail. The tufts of hair on his elbows and the "chaps" of his thighs fade into white. He has a notable golden brown mane and matching eyes and will challenge his sire in size. He will also have an extra toe on each front foot in addition to his dewclaws and one on each back foot, totaling 24 toes. He has a self-inflicted scar that is barely noticeable across the backside of his front right paw.

Tux's larynx is underdeveloped. His voiceclaim is Anthony Green.