Okenia rhinorma from the Red Sea

December 10, 2007
From: Binyamin Koretz


Hi Bill,

Here's a beautiful little nudibranch. From what we can see, it has 2 long rhinophores and a healthy, feathery set of gills surrounded by a ring of 6 appendages. Now if only we knew what it was.

Locality: Yatush slope, Eilat, Red Sea (Gulf of Eilat), Depth: 29 m, Israel
Length: ca. 1.5 cm, 16 March 2005. in sea grass and patch reef, currently covered with filamentous algae Photo: Binyamin and Shulamit Koretz

Best regards
Binyamin

binyamin@koretz.net

Koretz, B., 2007 (Dec 10) Okenia rhinorma from the Red Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13354

Dear Binyamin,
I am sorry it has taken so long to post your message. I am afraid it is one that got caught in the backlog when I had to close the Forum for an extended period over 2 years ago. When I was preparing a description of the new pink species, Okenia atkinsonorum [see #21273] I decided to search through all the backlog to see if there were any more Okenia I should deal with and found your photos, which I immediately recognised as a species I had seen in Tanzania 30 years ago, and had never seen again. The most noticeable feature were the very long - abnormally long - rhinophores. As often happened in Tanzania, photographic film was in short supply and by the time I was able to borrow a roll, my specimen was dying, and I was unfortunately unable to capture the full extension of the rhinophores in photographs. I had begun to wonder if I had exaggerated the length of the rhinophores in my field drawings and notes but your photographs confirm their enormity. The enormous rhinophores is the reason I have named it Okenia rhinorma.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Dec 10). Comment on Okenia rhinorma from the Red Sea by Binyamin Koretz. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13354

Factsheet

Okenia rhinorma

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