Re: Berthellina citrina from Reunion island

June 8, 2007
From: Hugues Flodrops

Concerning message #13106:

Dear Bill,
Here are three specimens from Reunion Island with more orange color than specimen of Philibert Bidgrain. In the first one, is it a red sponge above the Berthellina?

Locality: Etang-Salé, 0,5 metre, Reunion Island, Indian Ocean, 23 april and 5 may 2007, By night. Length: 18 mm and 35 mm. Photographer: Hugues Flodrops. Upper image: Etang salé, date observed 23 april 2007, lenght specimen 18 mm, Depth 0,5 metre.Under a rock. Other images:  5 May 2007. Same place. Length specimens : 18 mm and 35 mm. Front view is of the big one.

Thanks again for your time.
Bests regards.
Hugues.

hugues.flodrops@wanadoo.fr

Flodrops,H., 2007 (Jun 8) Re: Berthellina citrina from Reunion island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19948

Dear Hugues,

I can be fairly confident that these are Berthellina because I can clearly see the small internal shell [which I have outlined in the gray close-up]. One difference between species of Berthellina and Berthella is that the shell is small like this in Berthellina. However I will call it Berthellina citrina with caution because Lucas Cervera told me he was looking at these animals and had some indications that there was more than one orange-yellow Indo-West Pacific species. 

Concerning the red 'sponge' in the upper photo. It is in fact a solitary ascidian. You will see from the Fact Sheet that one of the common names of ascidians is 'sea squirt' because when they are exposed at low tide they sometimes squirt a jet of water out of one of the two siphons you can see in the photo.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jun 8). Comment on Re: Berthellina citrina from Reunion island by Hugues Flodrops. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19948

Factsheet

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