Scotoplanes, commonly known as the sea pig, is a genus of deep-sea sea cucumbers of the family Elpidiidae. They have particularly enlarged tube feet that have taken on a leg-like appearance, using water cavities within the skin to inflate and deflate the appendages. Scotoplanes live on deep ocean bottoms, specifically on the abyssal plain in the Atlantic, Pacific and Indian Ocean, typically at depths of over 1200–5000 metres.