SCP-811 is a 171cm (5'7) tall humanoid, resembling an adult woman with pastel green skin on the front of her torso, while her extremities have darker green blotches atop the pastel color. She has a 203cm (6'6) long tail, used for swimming. She partially resembles an amphibian, mostly due to her large orange eyes, large black pupils, webbed hands, and skin. She has large breasts (G cups), wide hips, and a partially slim waist, due to her bloated stomach. She has claws on the ends of her fingers.