Pleurobranchus grandis from Reunion Island

September 22, 2008
From: Hugues Flodrops


Dear Bill,
Here is a big pleurobranch: length about 180-200 mm. My best guess is Pleurobranchus forskalii without white semi-circle. Can you confirm this hypothesis? We can see the large gill on the posterior view, on the right side of the body.

Locality: Passe de l'Hermitage, 1,5 metre, Reunion, Indian Ocean, 28 December 2007, Night. Length: 180-200 mm. Photographer: Hugues Flodrops.

Thanks for your help.
Best regards.
Hugues.

hugues.flodrops@wanadoo.fr

Flodrops,H., 2008 (Sep 22) Pleurobranchus grandis from Reunion Island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21376

Dear Hugues,

This is a very dark purple-brown form of Pleurobranchus grandis.  The shape of the compound tubercles on the mantle and the way the posterior part of the mantle is often formed into a posteriorly pointing exhalent siphon, is quite characteristic of the species. Your photo alongside shows the gill, which is usually completely hidden on the right side of the body below the mantle. Fresh sea-water is drawn in anteriorly then flow backwards over the gill and then out the posterior siphon.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Sep 22). Comment on Pleurobranchus grandis from Reunion Island by Hugues Flodrops. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21376

Factsheet

Pleurobranchus grandis

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