This nudibranch is easy confused with Facelina bostoniensis and i have been hesitating for a long time about its identification unless i found on the net keys to distinguish among them. Distinctive characteristics are three: first cerata cluster clearly divided from other cerata, a bron spot on the head (it's the esophagus) and a blish shade on rinophores and on the cerata. This said i believe the animals depicted in the photos above are Facelina auriculata.

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