Easily recognized features within the genus include a ruffled pharynx,[2] branched intestines,[2] and tentacles on the leading edge.

[5] Because of the similarities in body plan and structure, it is assumed that chemical cues are how these organisms can recognize their own species and differentiate between others.

They are populous in the Indo-Pacific region and have been found as far north as Puget Sound,[8] where Pseudoceros canadensis has been identified, but mostly tend to stay in warmer waters.

[12] More recent technological advances have allowed for scientists to combine photomicrography with molecular analyses to more easily study these organisms.

In concordance with the theory that species should be identified based on color patterns, a new method for preserving Pseudoceros samples was developed in 1995 by Cannon and Newman.