Phyllidiopsis pipeki is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.

[2] The type specimen of this species was described from Madang, Papua New Guinea.

The original description included numerous specimens from Madang, the Philippines, the Great Barrier Reef and the Coral Sea.

[3] This nudibranch has a translucent dorsum with fine white or pink stippling and two longitudinal black lines.

The rhinophores are black at the tips with a pink area on the frontal surfaces.