Hypselodoris kanga feeding
May 10, 2007
From: Richard Swann
Hi Bill
I was reading Mike's post [#18901 ] and thought I would share a few images I took recently.
They display the yellow spots on the gills that you describe on Hypselodoris kanga and also a few close ups of H. kanga feeding.
Locality: Mamutik island,Kota Kinabalu, 11meters, Sabah, Borneo, South China Sea, 04 May 2007, sheltered reef. Length: 25mm. Photographer: Richard Swann.
I hope you find them an interesting addition to the forum.
Best regards
Richard
richard@downbelow.co.uk
Swann, R., 2007 (May 10) Hypselodoris kanga feeding. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19895Dear Richard,
These are a wonderful addition not only to the Forum but also to our knowledge of the biology of these animals. We have a number of records of H. kanga feeding, and all of them are on this species of Dysidea. However none of them show the oral tube extended as well as this and none of them show the structure of the sponge skeleton as well as this. The sponges eaten by chromodorids lack the mineral skeleton of spicules found in most sponges and so looking for spicules in their stomach contents is a waste of time. In fact it is more than a waste of time and can be very misleading because loose siliceous sponge spicules from dead sponges are very common on the sea floor and are often incorporated in growing colonies of other organisms, or contaminate food as it is eaten. For example it is not unusual to find sponge spicules in the stomach of herbivores who swallow them with theri algal food.
The skeleton of these non-spiculate sponges consists mainly of bundles of fibres which are arranged in a network framework. The classification of these sponges is partially determined by the way these fibres are arranged and how diiferent arrangements are found in different parts of the sponge colony. So your Hypselodoris has done the sponge experts job by cleaning off the soft tissue from around the fibre bundles, so we can confirm its identity.
Best wishes,
Bill Rudman
Related messages
-
Hypselodoris kanga from Andaman Islands
From: CR Sreeraj, December 14, 2009 -
Hypselodoris kanga from Indonesia
From: Sandrine Templin, March 3, 2008 -
Re: Hypselodoris kanga from Lembeh, Indonesia
From: Kamal El Tawil, September 28, 2007 -
Hypselodoris kanga from Indonesia [2]
From: Francois Zylberman, September 27, 2007 -
Hypselodoris kanga from Lembeh, Indonesia
From: Francois Zylberman, September 27, 2007 -
Hypselodoris kanga laying eggs
From: Carlos Munda, August 23, 2007 -
Hypselodoris kanga feeding in the Philippines
From: Mike Krampf, August 7, 2007 -
Hypselodoris kanga laying eggs in Lembeh
From: Mike Krampf, July 28, 2007 -
Re: Hypselodoris kanga feeding
From: Richard Swann, May 14, 2007 -
Hypselodoris kanga feeding - Thailand
From: spencer finn, March 6, 2007 -
Hypselodoris kanga from Lembeh St, Indonesia
From: Ken Tucker, January 11, 2006 -
Hypselodoris kanga from Bali
From: Erwin Kodiat, December 13, 2005 -
Hypselodoris kanga from Indonesia
From: Bill Rudman, July 4, 2005 -
Hypselodoris kanga from The Philippines
From: Paul Osmond, May 3, 2005 -
Hypselodoris kanga - juveniles from Sulawesi?
From: Francis & Pirjo Pellet, December 2, 2003 -
Hypselodoris kanga from Indonesia
From: Danny Van Belle, July 11, 2003 -
Boon sung & Bang sak - Thai place names
From: Danny Van Belle, March 21, 2003 -
Hypselodoris kanga feeding
From: Mary Jane Adams, March 19, 2003 -
Hypselodoris kanga - feeding observation
From: Danny Van Belle, March 14, 2003 -
Hypselodoris kanga from Singapore
From: Ria Tan, January 30, 2003 -
Hypselodoris kanga from Sulawesi
From: Mary Jane Adams , January 3, 2003 -
Hypselodoris kanga from Thailand
From: Danny Van Belle, December 18, 2002 -
Hypselodoris kanga from Sulawesi
From: Mary Jane Adams, July 12, 2002 -
Hypselodoris kanga from Papua New Guinea
From: Tim Murrell , December 13, 2001 -
Hypselodoris kanga from Hong Kong
From: Leslie Chan, July 16, 2001 -
Hypselodoris kanga from Hong Kong
From: Bill Rudman & Brian Darvell, July 16, 2001 -
Hypselodoris kanga from NW Australia
From: Clay Bryce, May 4, 1999 -
Hypselodoris kanga from the Philippines
From: Erwin Koehler, April 23, 1999 -
Hypselodoris kanga from Indonesia
From: Michael Miller, March 5, 1999