Plocamopherus maderae is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusk in the family Polyceridae.

The mantle edge has three pairs of branched papillae, one behind the branchial plume, one in front and one mid-way along the back.

The papillae behind the branchial plume bear rounded bioluminescent organs.

The rhinophores have lamellate tips and a tapering stalk and are similar in colour to the body.

[2] This nudibranch is normally nocturnal, hiding beneath boulders in shallow water during daytime.