It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
It lives in the Indo-west Pacific area, where it has been found in Queensland, Australia; Indonesia, the Marshall Islands, Papua New Guinea and New Caledonia.
[3] Notodoris citrina can grow to 60 mm in length.
There are raised yellow tubercles all over the body and three fused extra-brachial appendages which shelter the gills.
[3] Notodoris citrina feeds on calcareous sponges belonging to the family Leucettidae.