November 27, 2009
From: Les Clear
Concerning message #22881:
No the lovely blue colour was the pigment, which is how my wife spotted it in the first place. I was just using a very simple reef master camera.
firstname.lastname@example.orgClear, L, 2009 (Nov 27) Re: Aldisa sp. 4 from Madagascar. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22895
It's certainly a spectacular colour. Looking more closely at Valda Fraser's upper photo on the Fact Sheet I can see a few of whitish blue spots on that animal as well. Perhaps this species exudes bluish-white secretions from small glands in the skin. If so the blue patches could well be such secretions - but that's just a guess - but it would explain why some animals don't show blue 'spots' and others don't.
Aldisa sp. 4 from Madagascar
From: Les Clear, November 27, 2009
Aldisa sp from Reunion island
From: Philibert Bidgrain, April 12, 2006
Aldisa from Sth Africa
From: Colin Ogden, May 18, 2005
Aldisa? from South Africa
From: Valda Fraser, March 26, 2002
Aldisa from South Africa
From: Valda Fraser, January 5, 2002