Re: Risbecia pulchella at rest
February 17, 2009
From: Marcel Tanke
Note added 18 Feb 2009: The species in this message is Risbecia tryoni not R. pulchella. [See message #22262].
Concerning message #22255:
Hi Bill,
Maybe the "cuddling" is, like trailing, typical behaviour for Risbecia pulchella? The two in the pictures attached were moving, stopped and started "cuddling". I watched them a couple of minutes, they definitively were not mating during that time. But they continued moving over each other.
The pictures were taken at a 50 seconds interval.
Locality: Anilao, 10-15 m, Philippines, 13 July 2008. Length: max 4 cm. Photographer: Marcel Tanke.
Best regards,
Marcel
marceltanke@cs.com
Tanke, M.A., 2009 (Feb 17) Re: Risbecia pulchella at rest. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22261Dear Marcel,
Thanks for this quick response. Perhaps its some form of 'foreplay' preceding mating or a way to check if the partner is mature, or maybe they are just an affectionate species. It would be good to get some more observations.
In Valda Fraser's message, which you refer to, I made mention of the sponge her animals were on. Amazingly, I think your animals are on the same or a related species, which sometimes forms flat layers and other times a cup-shaped colony. As I mentioned in her message, it is not the type of sponge I would expect this species to eat, but finding R. pulchella associated with it in two oceans is quite interesting. The sponge looks to me like a Phyllospongia [Fam. Thorectidae], but I will need to get that checked by an expert. We only have records of Risbecia feeding on dysideid sponges, such as Euryspongia [see message #17602], but as we only have a few records at present, their food choice may be a little more complicated than we thought. It goes without saying that more records of 'cuddling' and association with this sort of sponge are very welcome
Best wishes,
Bill Rudman
Related messages
-
Risbecia tryoni from Indonesia
From: Mónica Alonso, December 10, 2009 -
Feeding Risbecia tryoni from Vanuatu
From: Leanne and David Atkinson, October 29, 2009 -
Re: Juvenile Risbecia tryoni from Vanuatu
From: Leanne and David Atkinson, February 25, 2009 -
Re: Risbecia pulchella at rest
From: Gary Cobb, February 18, 2009 -
Risbecia tryoni from the Philippines
From: Carrie Lo, June 30, 2008 -
Risbecia tryoni trailing
From: Mirjam Broos, December 11, 2007 -
Risbecia tryoni - what's in its mouth?
From: Elien Nijland, August 18, 2007 -
Chromodoris leopardus - just a nice photo
From: Ken Tucker, August 17, 2007 -
Risbecia tryoni - Trailing behaviour
From: Kerem Turker, July 26, 2007 -
Injured Risbecia tryoni
From: Clinton Bauder, July 23, 2007 -
Feeding Risbecia tryoni from Borneo
From: Richard Swann, May 16, 2007 -
Risbecia tryoni from the Philippines
From: Dr. Christine Meier, April 3, 2007 -
Strange Risbecia tryoni from Indonesia
From: Fred Vogt, March 8, 2007 -
Re: Risbecia tryoni - trailing observations:
From: Jack Connick, August 29, 2006 -
Trailing Risbecia tryoni from Malaysia
From: Sven-Urban Fjellner, August 26, 2006 -
Re: Risbecia tryoni - trailing observations:
From: Roberto Sozzani, August 26, 2006 -
Risbecia tryoni - trailing observations:
From: Hugues Flodrops, August 24, 2006 -
Risbecia tryoni from Cook Island, Tweed Heads, NSW
From: Ian Banks, June 12, 2006 -
Re: More on spots in Risbecia tryoni
From: Bruce Wilkie, May 11, 2006 -
Re: More on spots in Risbecia tryoni
From: Julie Marshall, May 8, 2006 -
Re: More on spots in Risbecia tryoni
From: Wayne Atkinson, May 5, 2006 -
Risbecia tryoni feeding
From: Bruce Wilkie, February 25, 2006 -
Re: Another pair of Risbecia tryoni?
From: Erwin Kodiat, February 8, 2006 -
Risbecia tryoni found on Sunshine Coast
From: Gary Cobb, November 13, 2003 -
Another pair of Risbecia tryoni?
From: Asther M. Lau, September 9, 2003 -
More on spots in Risbecia tryoni
From: Asther M. Lau, September 9, 2003 -
Risbecia tryoni from East Malaysia
From: Asther M. Lau, September 6, 2003 -
Risbecia tryoni trailing
From: Bruce Potter, July 7, 2003 -
Juvenile Risbecia tryoni from Indonesia?
From: Roberto Sozzani, May 26, 2003 -
Juvenile Risbecia tryoni from Malaysia
From: Asther M. Lau, May 9, 2003 -
Juvenile Risbecia tryoni from Vanuatu
From: Vinka Stenhouse, February 22, 2003 -
Risbecia tryoni from Indonesia
From: Kelvin Tan, February 12, 2003 -
Juvenile Risbecia tryoni from Lembeh Strait
From: Danny Van Belle, December 14, 2002 -
Risbecia tryoni with copepod
From: Marli Wakeling, October 4, 2002 -
Risbecia tryoni from Sulawesi
From: Helmut Schirmböck, July 12, 2002 -
Risbecia tryoni from Julian Rocks, nthn NSW
From: David Wachenfeld, July 1, 2002 -
Risbecia tryoni and food
From: Nishina Masayoshi, June 10, 2002 -
Risbecia tryoni from Perhentian, Malaysia
From: Alice Lee, May 26, 2002 -
Risbecia tryoni from Malaysia
From: Barbara Phua, May 9, 2002 -
Risbecia tryoni mating
From: Mary Jane Adams, May 9, 2002 -
Risbecia tryoni from Christmas Island
From: Bill Rudman, April 28, 2002 -
Risbecia tryoni from Bali
From: Stuart Hutchison, April 4, 2002 -
Risbecia tryoni (2)
From: Stuart Hutchison, April 4, 2002 -
Juvenile Risbecia tryoni? from Japan
From: Rie Nakano, January 11, 2002 -
Risbecia tryoni from Papua New Guinea
From: Marli Wakeling, October 30, 2001 -
Risbecia tryoni from Exmouth, W.A.
From: Kirk Gibson, April 8, 2001 -
Risbecia tryoni 'tailgating'
From: Drew Taylor , March 29, 2001 -
Risbecia tryoni? from Byron Bay
From: David Harasti, February 26, 2001 -
Risbecia tryoni from Bora Bora
From: Daniel L. Geiger, December 24, 2000 -
A very small Risbecia tryoni
From: Atsushi Ono, September 13, 2000 -
Trailing Risbecia with commensal shrimp
From: M. J. Adams, September 11, 2000 -
Trailing in Risbecia tryoni
From: Scott Johnson, August 16, 1999 -
'Trailing' behaviour in Risbecia tryoni
From: Erwin Koehler, April 8, 1999 -
Risbecia tryoni from the Philippines
From: Erwin Koehler, January 22, 1999