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.
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. Some related species can be found in the Antarctic. Scotoplanes (and all deep-sea holothurians) are deposit feeders, and obtain food by extracting organic particles from deep-sea mud. Scotoplanes globosa has been observed to demonstrate strong preferences for rich, organic food that has freshly fallen from the ocean's surface, and uses olfaction to locate preferred food sources such as whale corpses.
Scotoplanes, like many sea cucumbers, often occur in huge densities, sometimes numbering in the hundreds when observed. Early collections have recorded 300 to 600 individual specimens per trawl. Sea pigs are also known to host different parasitic invertebrates, including gastropods (snails) and small tanaid crustaceans.
The genus includes the following species:
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- MarineSpecies.org – Scotoplanes
- Scotoplanes article and photos on Echinoblog
- Sea pigs? Gross or cool? on Animal Planet website
- Sea Cucumbers: Holothuroidea – Sea Pig (scotoplanes Globosa): Species Accounts at Animal Life Resource
-  Neptune Canada "Sea Pig Slow Dance"
- Scotoplanes as a refuge for crabs
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