Re: Cadlinella subornatissima from Kwajalein Atoll
November 12, 2008
From: Scott Johnson
![](/images/m22032a.jpg)
Concerning message #22007:
Hi Bill,
Thanks for the comments on Cadlinella subornatissima. I'm sure that gray material in the rock crevices is sponge, but I'm afraid I cannot say for sure if the nudibranch was eating it. The particular photo of the animal strongly adhered to the rock with those patches of gray sponge around was indeed shot exactly where the animal was found. After a few minutes exposed to sunlight and camera lights, it got up and moved around. But I also cannot say if this sponge is what I thought was Halisarca metabola, the species I reported as the prey of Cadlinella ornatissima. My notes say only that a specimen was found eating that sponge, but do not say how I made that identification (and alas, my aging memory fails me on that point). I am not very knowledgeable about sponges and most of my id's from Enewetak came from comparisons with identified specimens in the collections of the Mid-Pacific Research Lab. I found Cadlinella ornatissima on a variety of substrates, but almost never could I clearly tell if they were feeding. Attached is one shot of that species that shows it near, but not on, a bit of gray sponge similar to that in the photo of C. subornatissima. It is just one more thing to watch for.
Locality: Kwajalein Atoll, 6 m, Marshall Islands, Pacific, February 1991, Under rock. Length: 15 mm [e047_09a]. Photographer: Scott Johnson.
Scott Johnson
uwkwaj@yahoo.com
Johnson, S., 2008 (Nov 12) Re: Cadlinella subornatissima from Kwajalein Atoll. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22032m2Thanks Scott,
Cadlinella is proving a difficult genus to get any solid information on its food choice. Apart from just wanting to now something about its biology, its apparent basal position in the evolution of the chromodorids means that its food choices could help to better understand how other chromodorids began to become more specialised in their food choice. We know that in the Actinocyclidae [Actinocyclus, Hallaxa] - which is the possible sister group to the chromodorids - that species feed on the sponge Halisarca, and we know that species of Cadlina feed on Halisarca and darwinellid sponges. As many species of Chromodoris feed exclusively on darwinellids this provides us with a nice link between the Chromodorididae and the Actinocyclidae. So it would be nice to have better evidence for the food of Cadlinella.
Hopefully conversations like this will jog someone's memory of a photo they have or like you, cause them to add it to their 'to do' list. I don't expect miracles, but I am more than happy with a nice surprise every now and then.
Best wishes,
Bill Rudman
Related messages
-
Cadlinella ornatissima feeding
From: Toh Chay Hoon, April 1, 2010 -
Re: Cadlinella ornatissima - egg ribbon
From: Brian Mayes, August 17, 2009 -
Cadlinella ornatissima from sthrn Queensland
From: Gary Cobb, November 7, 2008 -
Cadlinella ornatissima from the Red Sea
From: Shahar Patury, September 8, 2007 -
Re: Mating Cadlinella ornatissima from nthn Marianas
From: Yuji Fujie, June 12, 2007 -
Mating Cadlinella ornatissima from nthn Mariana Islands
From: Yuji Fujie, June 1, 2007 -
Cadlinella ornatissima from Thailand
From: Danny Van Belle, January 24, 2007 -
Cadlinella ornatissima from Reunion Island
From: Sandrine Flodrops, September 6, 2006 -
Cadlinella ornatissima from Fiji
From: Leanne & David Atkinson, July 23, 2003 -
Cadlinella ornatissima from Batam, Indonesia
From: Alice Lee, July 14, 2003 -
Cadlinella ornatissima from Myanmar
From: Mary Jane Adams, March 26, 2003 -
Cadlinella ornatissima from Taiwan
From: Connie, October 9, 2002 -
Cadlinella ornatissima from Malaysia
From: Richard Houghton, July 17, 2002 -
Cadlinella ornatissima from Hong Kong
From: Bill Rudman & Brian Darvell, January 28, 2002 -
Tonga Records: Cadlinella ornatissima
From: Don Barclay, May 29, 2001 -
Cadlinella ornatissima from New Zealand
From: Gareth Jones, April 5, 2001 -
Colour variation in Cadlinella ornatissima
From: Scott Johnson , December 26, 2000 -
Cadlinella ornatissima - egg ribbon
From: Scott Johnson, December 26, 2000 -
Cadlinella ornatissima from South Africa
From: Valda Fraser, December 12, 2000 -
Cadlinella from Thailand
From: Erwin Koehler, June 29, 1999 -
Re: Cadlinella ornatissima
From: Stephanie A. Clark, December 22, 1998 -
Cadlinella from Sydney
From: Akos Lumnitzer, December 8, 1998