It is a marine gastropod mollusc in the family Facelinidae.
Additional localities mentioned in the description include Grand Cayman, Little Cayman, Jamaica, Eleuthera, Belize and Honduras.
[1] This species feeds on the gorgonian coral Plexaurella dichotoma.
Feeding on soft corals instead of hydroids is typical of the genus Phyllodesmium but in Phyllodesmium there are no functional cnidosacs, possibly because the cnidae of soft corals are not useful in defence of the nudibranchs.
Pauleo differs from Phyllodesmium in having functional cnidosacs.