Hermissenda crassicornis from Oregon, USA
June 3, 2006
From: Julie Gilchrist
I noticed this curious creature in a shallow beach tidepool this weekend in Oregon.
Locality: Cannon Beach, 6 inch tidepool, Oregon, USA, NW Pacific, 30 May 2006, sandy tidepool on beach. Length: 1 inch. Photographer: Julie Gilchrist.
Any ideas on what it is?
Thanks!
Julie Gilchrist
jules@thisjourney.com
Gilchrist, J., 2006 (Jun 3) Hermissenda crassicornis from Oregon, USA. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16753Hi Julie,
Thanks for thinking of us with your request. You have found one of the prettiest aeolid nudibranchs on this coast. This is Hermissenda crassicornis. Some folks use the common name - Opalescent sea slug, but I prefer to avoid these.
Although the coloration of the cerata varies with locality, the one characteristic that is always present is the thin romboid shaped patch of orange, outlined with white, just behind the rhinophores. The white may be flanked with blue, which can also be found along the edge of the foot and medially on the tail.
This species grazes on hydroids, both in tidepools and subtidally.
Thanks
Dave Behrens
Related messages
-
Hermissenda crassicornis eating Flabellina trilineata
From: John Albers-Mead, August 15, 2007 -
Hermissenda vs. Corynactis
From: Bruce Wight, August 3, 2007 -
Nudibranch Parasite? - Hermissenda
From: Bruce Wight, August 1, 2007 -
Colour variation in Hermissenda crassicornis
From: Carissa Thomas, April 4, 2007 -
Re: Hermissenda crassicornis from Sth Korea
From: Ron Velarde, February 25, 2006 -
Hermissenda crassicornis from Sth Korea
From: Dong Bum Koh, February 24, 2006 -
Hermissenda crassicornis eating ascidians?
From: Marli Wakeling, February 3, 2006 -
Hermissenda crassicornis genetics
From: Martin H. Johnson, December 12, 2005 -
Re: Janolus fuscus from Puget Sound
From: Jeff Goddard, October 5, 2005 -
Re: Janolus fuscus from Puget Sound
From: Jack Connick, October 4, 2005 -
Re: Janolus fuscus from Puget Sound
From: Jack Connick, September 30, 2005 -
Flabellina pricei or mistaken identity
From: Jan Kocian, August 9, 2005 -
Re: Janolus fuscus from Puget Sound
From: Jeff Goddard, July 6, 2005 -
Re: Janolus fuscus from Puget Sound
From: Jack Connick, July 2, 2005 -
Re: Nudibranch eggs will travel
From: Marli Wakeling, May 9, 2005 -
Nudibranch eggs will travel
From: Marli Wakeling, May 7, 2005 -
Re: Raising Hermissenda for research
From: Ray Izumi, May 6, 2005 -
Raising Hermissenda for research
From: Daniel Swezey, April 29, 2005 -
Hermissenda crassicornis Cannibalism?
From: Daniel Swezey, February 28, 2005 -
Hermissenda crassicornis with eggs
From: Bruce Wight, February 10, 2005 -
Hermissenda crassicornis from California
From: Bruce Wight, August 9, 2004 -
Trailing behaviour in Hermissenda crassicornis
From: Marli Wakeling, December 22, 2003 -
Hermissenda - 1000 miles from land
From: Hiroaki Sakoh, November 15, 2003 -
Hermissenda crassicornis feeding
From: Glen Miller and Jackie Hildering, September 30, 2003 -
Hermissenda crassicornis without cerata
From: M.J. Adams, August 14, 2003 -
Hermissenda crassicornis from the Channel Ids, California
From: Bruce Wight, August 5, 2003 -
Hermissenda crassicornis from California
From: Chris Grossman, August 1, 2003 -
Re: Update on Hermissenda ailments
From: Rosemary Romero, July 30, 2003 -
Update on Hermissenda ailments
From: Ian Dow, July 18, 2003 -
Re: Ailments in Hermissenda crassicornis
From: Kathe R. Jensen, July 17, 2003 -
Ailments in Hermissenda crassicornis
From: Ian Dow, July 16, 2003 -
Hermissenda from California
From: Bruce Wight, October 17, 2002 -
Hermissenda crassicornis from British Columbia
From: Marli Wakeling, October 10, 2002 -
Hermissenda crassicornis from San Miguel, Calif.
From: Bruce Wight, August 12, 2002 -
Looking for photos of Hermissenda veligers
From: G. Sparks, July 22, 2001 -
Hermissenda crassicornis question
From: Robert Baker, June 12, 2001 -
Information on Hermissenda crassicornis
From: Bill Rudman, February 17, 2001 -
Variation in Hermissenda crassicornis
From: Bruce Wight, August 4, 2000 -
Hermissenda crassicornis feeding on Geoducks?
From: Pacific Shellfish Institute, August 4, 2000 -
Hermissenda crassicornis from California
From: Bruce Wight, July 15, 2000 -
Hermissenda Mating Preferences...
From: Ty Lim, March 6, 2000 -
Re: Hermissenda
From: Max O'Brien, February 20, 2000 -
Re: mating information
From: Ty Lim, February 16, 2000 -
Mating behaviour in Hermissenda
From: Ty Lim, February 15, 2000 -
Finding out what I see under water
From: Max O'Brien, February 7, 2000 -
Source for Hermissenda crassicornis on E. coast
From: David Chan, October 16, 1999 -
Re: Hermissenda feeding
From: Cesar Megina, July 22, 1999 -
Re: Hermissenda feeding
From: Benjamin Ross, July 21, 1999 -
What is the best food for Hermissenda?
From: Benjamin Ross, July 20, 1999 -
Re: Use of name Hermissenda
From: Bill Rudman, June 23, 1999 -
Correct genus for Hermissenda crassicornis
From: Maria Byrne, May 20, 1999