Tropical and warm temperate Indo-West Pacific.
UPPER: Two animals on Caulerpa filiformis, Shelly Bch, Manly, Sydney, 6m, March 1984. Note enrolled structure of rhinophores clearly visible in smaller animal.
LOWER: Koumac Beach (=Baie de Ouanap), near Koumac, New Caledonia, grass-beds, algae, October 1993, 2 specimens (25 & 31mm long alive), showing colour variation.
PHOTOS: Bill Rudman.
Species of Oxynoe are found feeding on a variety of species of Caulerpa where they are well camouflaged because of their colour. There are a number of different species, but the common one throughout the Indo-West Pacific, Oxynoe viridis, would appear to be somewhat variable in colour even in a single locality. The green can very from dark green to grenish yellow and the blue spots can be range from large blue eyespots all over the body to small blue specks along the parapodial edge. Some variation is illustrated on this page.
Oxynoe has a fragile bubble-shaped shell which is partially enclosed by parapodial flaps. They can produce a sticky white secretion when attacked or disturbed, and in extreme danger they can break off the long muscular foot which continues to wriggle vigorously for some time after it is broken off. In time, a new tail will grow.
• Pease, W.H. (1861). Descriptions of new species of Mollusca from the Pacific Islands. Proceedings of the Zoological Society of London: 242-247.
Rudman, W.B., 1999 (July 12) Oxynoe viridis (Pease, 1861). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/oxynviri
Re: A juvenile Oxynoe viridis ? from nthn Mariana Islands
From: Takao Urasawa, July 28, 2008
Sea slug species from Turkey
From: Tom Turk, November 26, 2007
Re: Oxynoe viridis from East Timor
From: Brian Francisco, September 11, 2006
Oxynoe viridis from East Timor
From: Brian Francisco, September 9, 2006
Oxynoe from the Red Sea
From: Dr. Jacob Dafni, February 23, 2005
Egg mass of Oxynoe viridis
From: Nishina Masayoshi, July 6, 2002
Oxynoe viridis? from Turkey
From: Baki Yokes, May 16, 2002
Retractile papillae in Oxynoe
From: Nishina Masayoshi, May 10, 2002
Oxynoe? from Japan
From: Nishina Masayoshi, April 30, 2002
Oxynoe viridis from Hachijo Island, Japan
From: Nishina Masayoshi, August 17, 2001
Oxynoe viridis f rom South Australia
From: Nigel Holmes, August 17, 2001
Oxynoe viridis from Heron Island
From: Julie Marshall, August 6, 2000
Is this a Juliidae?
From: Grey McNeil, July 21, 1999
Oxynoe viridis & Lobiger viridis the same?
From: Karen Gowlett-Holmes, July 13, 1999