Elasipodida
Introduction '''Elasipodida''' is an order of sea cucumbers. They have numerous appendages, including conical papillae and leaf-like tentacles. Although many species are benthic, a number are pelagic, and may have their appendages modified to form sails or fins. Most members of the order inhabit deep-sea environments, such as the species of the genus ''Enypniastes''.
Classification The following families are recognised in the order Elasipodida: * family Elpidiidae Théel, 1882* family Laetmogonidae Ekman, 1926* family †Palaeolaetmogonidae  Reich, 2012 * family Pelagothuriidae Ludwig, 1893* family Psychropotidae Théel, 1882Image:Pelagothuria natatrix.jpg|The only true pelagic echinoderm known to date : ''Pelagothuria natatrix'' (here close to the Galapagos).Image:Expl0790 - Flickr - NOAA Photo Library.jpg|''Benthodytes sp. ''Image:Scotoplanes globosa and crab.jpg|''Scotoplanes globosa'' (a.k.a. "sea pig", family Elpidiidae)Image:Expl5475.jpg|A PelagothuriidaeImage:Expl5494.jpg|A Psychropotidae
References * *
Notes