Chromodoris quadricolor - strange behaviour

October 7, 2005
From: Kamal El Tawil

Dear Bill:
I know this may sound strange, but do you think a nudibranch like Chromodoris quadricolor can react to the presence of a large prey or a diver ?

When I approached one last week, it seemed to "stand up" on its rear end. is this a matter of coincidence ?

Kind regards
Kamal
Cairo, Egypt

kt@tedata.net.eg

El Tawil, K., 2005 (Oct 7) Chromodoris quadricolor - strange behaviour. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14937

Dear Kamal,
Have a look at my comments on an earlier message [#8367] for an answer. It's possible your pressure wave as you got close to it lifted its head and caused it to start its normal waving behaviour, or you may have just caught it by coincidence. This waving of the head is one way these animals can 'sense' interesting molecules in the water. When the wind is blowing, my dog often cranes its head in the air and waves its head around sniffing - doing much the same thing I guess. In the case of the slug, its rhinophores are its nose.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Oct 7). Comment on Chromodoris quadricolor - strange behaviour by Kamal El Tawil. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14937

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