This small, white to beige species grows up to 7 cm long. Its curved body is tapered at the ends, but is not as stiff as Pentamera rigida. It has numerous fine tube feet in five bands, reduced in number at the extremities. The ten tentacles consist of eight large and two small, ventral tentacles.
Skin ossicles: small roundish tables with four main holes and four smaller holes and a two-pillared spire; the supporting tables are slightly curved with a low spire; the introvert region has similar ossicles, but a bit smaller with fine teeth on the spire. Tentacles have two types of osssicles; finer, oblong, curved, perforated plates with two larger central holes; and large robust curved rods with a few holes.
Similar SpeciesPentamera pediparva could be confused with Pentamera rigida and Pentamera populifera. One should check the skin ossicles to be sure of the species. Sometimes differences in shape may be due to how the specimens were preserved.