Stylocheilus striatus swarms at Reunion Island

October 31, 2005
From: Philibert Bidgrain

Dear Bill,
Re Reunion Island sea slugs.
A few days ago Daniel Nardin reported seeing many groups of hundreds, and in some cases more than one thousand Stylocheilus striatus  in "Trou d'eau" lagoon crawling on the sandy substrate. It's the first time than we have observed this gregarious behavior. Is it usual for them to do this? What's the reason of this abnormal number, and this gregarious behavior?

Locality: "Trou d'Eau" Lagoon, Reunion Island. Indian Ocean. Depth: 50 cm
Length: 4 cm. 28 October 2005. sandy substrate. Photographer: Daniel Nardin

Best Regards
Philibert Bidgrain
http://vieoceane.free.fr/runseaslug/indexslug.htm

vieoceane@free.fr

Bidgrain, P., 2005 (Oct 31) Stylocheilus striatus swarms at Reunion Island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15142

Dear Philibert,
If you have a look at the "Related Messages" listed below your message, for June and July 2005, you will see similar reports of Stylocheilus swarming from the Caribbean and Hawaii, and links to other discussions on the Forum about this phenomenon. It is a spectacular sight.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Oct 31). Comment on Stylocheilus striatus swarms at Reunion Island by Philibert Bidgrain. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15142

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Stylocheilus striatus

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