You are very welcome Mila By the way you or we could perhaps also place a copy of that image on the page Polyceridae  a fmaily of nudibranchs because that species  Triopha catalinae J G Cooper  seaclown triopha  is listed there since it belongs to that family Since the species name Triopha catalinae is linked to a nonexistent page we could even if we felt like it to start a new page for that species By the way in English the word nudibranchs is spelled without the e I did try to look up your images on Bills site but I was not able to get to the exact page on a lot of them just a list and at the present time  I did not take the time to try to track it down any further Maybe I will do that later