Size: 23 cm
Scotoplanes, commonly known as the sea pig, is a genus of deep-sea sea cucumbers of the family Elpidiidae, order Elasipodida.
Members of the Elpidiidae 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 modify surficial elements in the ocean by moving through the sediment like a bulldozer. While the Scotoplanes move through the sediment, Scotoplanes disrupt the surface and the resident infauna as it digests sediment. (from Wikipedia)