Aldisa zetlandica

Erling Svensen From todays dive - Aldisa zetlandica. We have a divesite where this nudi is common all the year, and today I saw 100-dreds. In the upper left corner a Adwardsia anemone.

Christian Skauge I need to come down and dive with you guys soon... just gotta get a new camera first :-)

Jussi Evertsen But are you sure this ia Aldisa zetlandica?

Erling Svensen Yes, very sure. I had Bernard Picton on this location, and that was his first comment when coming up from the dive.....

Bernard Picton Need to check a radula, Jussi. Erling, can you preserve a couple? Even in very strong salt would do, water with so much salt it won't all dissolve, in a small container.

Erling Svensen From todays dive - Aldisa zetlandica. We have a divesite where this nudi is common all the year, and today I saw 100-dreds. In the upper left corner a Adwardsia anemone.

Christian Skauge I need to come down and dive with you guys soon... just gotta get a new camera first :-)

Jussi Evertsen But are you sure this ia Aldisa zetlandica?

Erling Svensen Yes, very sure. I had Bernard Picton on this location, and that was his first comment when coming up from the dive.....

Bernard Picton Need to check a radula, Jussi. Erling, can you preserve a couple? Even in very strong salt would do, water with so much salt it won't all dissolve, in a small container.

Klas Malmberg Aquatilis So has anybody suggestions about this little friend from sweden? Aldisa???

Erling Svensen We have a lot of this one deeper than 30 meter. Aldisa zetlandica i belive....

Erling Svensen Adalaria proxima and A. loveni from todays dive.

Ronni Bless Bekkemellem great !!

Jussi Evertsen So which one is the A proxima?

Erling Svensen The white one I hope.

Ian Smith Are you sure? The tubercles are much more widely spaced than on A. proxima that I have seen. See http://www.conchsoc.org/node/5333

Erling Svensen I am not sure, but if I look at Bernards "Encyclopedia of Marine Life" pages, the tubercles are different on these two. The yellow one has more flat tubercles, and the white one more pointed. But I do not know. Please look at Bernards pages on these two species. This is interesting..... :-)

Erling Svensen What about this one?

Erling Svensen .... and this one?

Ian Smith My white Orkney one is typical of several I sent to T.E.Thompson author of Biol Opisth Moll. He checked the radulae and all were proxima. Your two latest postings: yellowish one O. muricata & white one I don't know; neither proxima nor muricata.

Erling Svensen Could the white one be Acanthodoris pilosa or Aldisa zetlandica?

Ian Smith Tubercles on your last image are such a good match for the encrusting organism it is on that it surely is the pablum.

Erling Svensen Ian - my english is not good enought. What is pablum? There are one white and one reddish brown on the last image.

Ian Smith Apologies Erling , "pablum" is Latin for "nourishment / food" and is used in some scientific papers. I misinterpreted your photo; I thought the reddish-brown one was the food organism. I was right about the match of tubercles :-) Your last white posting does have soft linear tubercles like pilosa but it doesn't look quite right - flatter than I'm used to, but it's a possibility - I'd feel safer if we could see the kinked rhinophores that remind me of the horns of long-horn cattle. I'm not familiar with zetlandica, so can't comment on it.

Erling Svensen Thanks, Ian. Here is for sure the Aldisa zetlandica.

Ian Smith Thanks. I'd say that is a closer match, but you'll know more about it than I.