July 12, 2006
From: Leslie Harris
As a follow up to my comment the other day about a fish picking on a nudibranch [message #17073] here are Kevin Lee's pictures of the attack and the victim 5 minutes afterwards. The aggressor is a California Garibaldi Hypsypops rubicundus and its intended snack item is Peltodoris nobilis. The fish was targeting the nudibranch's rhinophores & gill filaments.
Locality: Deadman's Reef, off Laguna Beach, about 60 feet, California, USA, Northeast Pacific, 4 July 2006, temperate rock reef. Length: 3 inches. Photographer: Kevin Lee.
firstname.lastname@example.orgHarris, L.H., 2006 (Jul 12) Fish attacking Peltodoris nobilis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17102
Thanks Leslie (and Kevin),
Actually catching fish nibbling at nudibranchs 'in natural situations' is quite difficult. When we think of the defensive metabolites [chemicals] many nudibranchs have in their skins we tend to forget they are often found in the gills and rhinophores as well. If you look carefully at living animals you can often find opaque white lumps scattered through the transparent or semi-transparent gills. These are aggregations of defensive chemicals which we hypothesise are designed to serve in precisely this sort of situation. A curious and hungry fish will nibble the gills or rhinophores and be deterred from investigating the rest of the body by the distasteful chemicals it experiences. One large group of dorid nudibranchs, which used to be called the Cryptobranchia [= hidden gills] can protect their gills and rhinophores by withdrawing them into pockets beneath the skin.
Re: Peltodoris nobilis eggs (British Columbia)
From: Jackie Hildering & Glen Miller, August 17, 2007
Peltodoris nobilis eggs (British Columbia)
From: Jackie Hildering, August 14, 2007
Peltodoris nobilis from California waters
From: Ken Tucker, August 9, 2007
Peltodoris nobilis mating
From: Jim Lyle, December 4, 2006
Peltodoris nobilis from Puget Sound, Washington
From: Jan Kocian, April 28, 2006
Re: Anisodoris nobilis - Peltodoris or Archidoris?
From: Angel Valdes, April 4, 2006
Anisodoris nobilis - Peltodoris or Archidoris?
From: Bill Rudman, April 3, 2006
Peltodoris nobilis from Santa Cruz Is.
From: Kevin Lee, April 3, 2006
Mating Anisodoris nobilis
From: Bruce Wight, October 1, 2001
Re: Anisodoris nobilis? from California
From: Bruce Wight, January 25, 2001
Anisodoris nobilis from Santa Cruz Island
From: Jeff Goddard, January 25, 2001
Anisodoris nobilis? from California
From: Deb Lantis, January 21, 2001
Another photo of Anisodoris nobilis
From: Bruce Wight, October 12, 2000