#goniobranchus tritios

Goniobranchus tritos is a dorid nudibranch found by the Maldives. It can grow to around 4.5 cm long, and is closely related to the Fried Egg Nudibranch (which, if you follow the link, you’ll see I said it was Chromodoris annulata - the whole Goniobranchusgenus used to be considered part of the Chromodorisgenus!)

Photo source - erwinkoehler on iNaturalist