Fooled by look-alike nudis

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Posted by Merry on October 27, 2016 at 15:58:06:

This is for Dr. Bill who once asked about how to distinguish these two dorid nudibranchs.

Phil, Kevin, and I are having fun reaping the bounty of subjects on our new favorite dive site, Kevin's Reef. Here's an example of why we shouldn't assume anything with respect to identifying sea slugs. You never know what you might find.

Kevin's Reef on 9/18 - Phil found this large nudi, and we all assumed it was Peltodoris mullineri. Wrong. This is Jorunna pardus.
 photo Jorunna pardus DSC_6842_zpsgznmw5yx.jpg

Kevin's Reef on 10/9 - Although this one looked a little different, I casually assumed that it was a variation of Peltodoris mullineri. Wrong again! This is also Jorunna pardus.
 photo Jorunna pardus DSC_7004_zpsmxuebefu.jpg

One difference between the two species is that Peltodoris mullineri has solid yellow to orange rhinophores and gills.
This is the REAL Peltodoris mullineri.
 photo Peltodoris mullineri DSC_4511_zpsqml6njty.jpg

Peltodoris mullineri
 photo Peltodoris mullineri br DSC_7652_zpsrgbrnrdy.jpg

To confound things further, here's Phil's photo of a true Peltodoris mullineri on Kevin's Reef, clearly demonstrating the presence of both species.
 photo Kevins Reef 11_zpsg978qbgb.jpg

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