Psychropotidae

Psychropotidae is a family of deep-sea swimming sea cucumbers. The geographic range of some psychropotids is very extensive at abyssal depths, whereas other species are found within more restricted ranges.

Psychropotes is a genus of sea cucumbers in the family Psychropotidae. The members of this genus possess the ability to swim, although this is only facultative.

species of echinoderm

Benthodytes is a genus of sea cucumbers in the family Psychropotidae.

Psycheotrephes is a genus of sea cucumbers in the family Psychropotidae.