Re: Two colors for Bosellia mimetica

March 26, 2008
From: Kathe R. Jensen

Concerning message #21045:

Dear Bill & Miquel,

When Bosellia mimetica feeds on Halimeda, it usually forms a white zig-zag trail on the Halimeda surface. The almost complete white surface on these pictures probably means that the animals have been feeding for a long time on the same spot. However, it may also indicate that Halimeda has "spawned" (released zoospores or gametes). Usually this involves terminal segments of Halimeda, and it looks like all contents of surface utricles leave the alga. Small clumps of very dark green material are seen towards the tip of these segments. This process often attracts sacoglossans, so finding 3 specimens of Bosellia close together could indicate this - though the brown specimen looks like it has not fed for a while.


Jensen, K.R., 2008 (Mar 26) Re: Two colors for Bosellia mimetica. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Kathe,

Bill Rudman


Bosellia mimetica

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