Tritonia coralliumrubri is a species of dendronotid nudibranch. It is a marine gastropod mollusc in the family Tritoniidae.[1] It feeds on the octocoral Corallium rubrum, the red coral.
This species was found at Capo Caccia, Alghero, NW Sardinia, at 100 m depth, 40.9833°N 19°W.