This is identified as Goniobranchus sp. 1 in Gosliner et al (2018). I've always thought its external surface reminded me more of some Verconia or Mexichromis. I wonder where the molecular data falls. Several have been observed on sponges at muck sites around Tulamben.
An egg mass of this nudibranch is at upper left.
Created 20 May 2019
Updated 7 July 2024