This seems to be a common thread, but here is another nudibranch that I am having a hard time identifying. I think the most likely identification is for Chromodoris tennentana or Goniobranchus tennentanus which are both the same (the Chromodoris family seems to have received a lot of reclassifications over the past few years). But other possibilities are Chromodoris collingwoodi (mainly based on the fact that they are reported to be extremely variable in their coloration and change throughout their life cycle, or possibly Chromodoris vicina which is sometimes debated as the same species as Chromodoris tennentana as they are described almost identically (but it seems it is becoming less likely that they are the same species). Regardless, another beautiful nudibranch…