I came across a strange writhing ball on a night dive this week. On closer inspection it was two Mooon-faced Nudis mating. One was dragging the other around until they split up.
After that they went their seperate ways, until they found some nice soft sand, then buried themselves in it…
The Moon-faced Nudibranch
Euselenops luniceps by Kaj Maney, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.