Lophodoris danielsseni is a species of sea slug, a Dendronotid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
This species was first described from Norway. It has subsequently been reported from a few localities between Bergen and Tromsø.
This goniodorid nudibranch is white in colour.
Lophodoris danielsseni feeds on bryozoans.