July 17, 2008
From: Dominique Horst
Concerning message #21676:
Still about Aglaja tricolorata. We have often see two individuals that have a particular behaviour. They are moving in a procession, one behind the other. Are they mating?
Usually in the couple, one has a dark colour and the other one is less dark.
Not sure this has any significance, but the behaviour is strange.
Locality: Cagnes, 8 m, France, Mediterranean sea, 15 July 2008, muddy. Length: 30 mm. Photographer: Dominique Horst
firstname.lastname@example.orgHorst, D., 2008 (Jul 17) Aglaja tricolorata 'trailing'. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21709
As I discuss on the Fact Sheet, manyy sea slugs exhibit this 'trailing' behaviour. There are photos of at least three aglajids doing this in Forum messages [ Chelidonura varians, Chelidonura inornata, Chelidonura punctata] and we know that Navanax inermis does as well. In all these cases there is no direct evidence of mating so all we can say is that they seem to be following the mucus trail of the lead animal.
There are also a couple of examples of the Forum of species of Chelidonura forming mating chains - Chelidonura livida [#8036] , and C. punctata [#16512], a behaviour similar to that observed in Sea Hares [see Mating Chains Fact Sheet]. I have personal experience of another aglajid, Melanochlamys cylindrica, forming mating chains, with up to 5 or 6 animals linking head to tail. This did not seem to be a normal behaviour but when groups of animals were kept in close proximity - in an aquarium or jar - they would quickly begin mating head to tail in long chains.
I can't see any evidnce of mating in your animals so I assume the 'follower' is just attracted to the lead animals mucus trail.
Re: Aglaja tricolorata 'colour variation'
From: Dominique Horst, August 17, 2009
Re: Aglaja tricolorata 'feeding'
From: Dominique Horst, September 5, 2008
A damaged Aglaja tricolorata
From: Dominique Horst, September 4, 2008
Re: Aglaja tricolorata from the French mediterranean
From: Dominique Horst, July 7, 2008
Aglaja tricolorata from the French mediterranean
From: Dominique Horst, July 4, 2008
Aglaja tricolorata from Malta
From: Patricia Peels, February 1, 2007