Hypselodoris melanesica is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

It is known only from Papua New Guinea and the Solomon Islands.

[3] Hypselodoris melanesica has a translucent pale purple body with a thin white band at the edge of the mantle.

The rhinophores have bright orange clubs and a deep purple sheath at the base.

[1] This species can reach a total length of at least 30 mm.