March 9, 2010
From: Jan Kocian
Concerning your request for a photo [message #23252], here are some Orange sea pens - Ptilosarcus gurneyi from the Eastern Pacific, for the sea pen page. The second photo illustrates what happens to them when a hungry horde of Armina californica picks one of them for lunch.
Locality: Possession Point beach,Whidbey Island, 50 feet, California, Eastern Pacific Ocean, 19 August 2009, Sandy slope. Photographer: Jan Kocian.
firstname.lastname@example.orgKocian, J, 2010 (Mar 9) Sea pens. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23276
Thanks very much. I thought it would be sad to have a photo of a dead or dying sea pen to represent them, so your photo of a proud group of them standing tall is just what I wanted.
Not that your message contains a happy ending, but it well illustrates just how specialised many nudibranchs have become. Having such a specialised diet can be an advantage when the food is plentiful, but it does mean that if the sea pen population disappears for some reason the Armina population will starve.
Re: Armina californica - feeding
From: Betty Bastai, June 2, 2010
Armina californica and the sea pansy Renilla
From: Kevin Lee, March 17, 2010
Armina californica eggs
From: Jan Kocian, November 6, 2007
Armina californica - feeding
From: Jan Kocian, September 26, 2007
Armina californica feeding, eye spots
From: Mike Neubig, May 29, 2006
Re: Sea Pens and Armina
From: Jan Kocian, October 7, 2005
Armina californica Last Supper?
From: Jan Kocian, October 5, 2005
Juvenile Armina californica feeding
From: Paul Sim, June 14, 2005
Armina californica from Vancouver Island
From: David Roberts, July 9, 2004
Armina californica from Monterey, CA
From: Clinton Bauder, February 17, 2004
Re: Striped Nudibranch from California
From: Scott Johnson, November 1, 2002
Striped Nudibranch from California
From: Natasha Hopkins, October 29, 2002