Halgerda orstomi

Halgerda orstomi is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.

Distribution
This species was described from a specimen collected at Vanuatu at depths of 235–251 m and three Paratypes from the same area. Additional specimens included in the original description are from the Philippines and New Caledonia at depths of 92–120 m.