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, 1882 References Notes Echinoderm orders