Re: Photos of Roboastra tigris feeding

January 14, 2001
From: Angel Valdes

Dear Bill,

Regarding your question on the bluish tinge in the region where the Roboastra and the Tambja are meeting, I'm afraid it is just a reflection from the water. I think I had my flash to close to the water when I took the photo.

Which is very interesting to me is the way Roboastra orientates the rhinophores. When the animals are crawling around they have the rhinophores oriented towards the laterals of the body (like in the first picture), but when they are close to a prey they move them forward forming a "V". I suspect they use this system to locate the position of the preys more precisely. This seems to be similar to the triangulation system used in navigation. I saw this behavior in several specimens examined and it is very spectacular.

All the best,

Valdes, A., 2001 (Jan 14) Re: Photos of Roboastra tigris feeding. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Angel,
Bill Rudman


Roboastra tigris

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