Daytime activity in Pleurobranchaea brockii

January 10, 2002
From: Ákos Lumnitzer

HI Bill,
Reading the comments about Pleurobranchaea brockii, I would just like to add that on August 29th, during a morning dive around Laings Point in Sydney Harbour, I found a P. brockii out and about doing its business on the sandy bottom in 4m of water.

That was my first ever sighting - no camera either, but I am dead certain of the species.
It's strange how so many nocturnal creatures can literally slap us in the back of the head and do what they are "told" NOT to do???? -that is crawl around during the day!

And to add a little more, finally I have seen and photographed (though not yet developed) Euselenops luniceps in Camp Cove last Friday night. (Jan 3 2002) We must have seen a good dozen and I even found a pair mating. Let's hope the pictures will turn out half decent so I can send them to you!
Regards
Ákos

dna72@softhome.net

Lumnitzer, A,, 2002 (Jan 10) Daytime activity in Pleurobranchaea brockii. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5913

Thanks Akos,
I think Erik was just speculating that P. brockii was nocturnal rather than stating that it definitely was. Many sand dwellers do come to the surface at night - perhaps to catch their prey - but there are always exceptions to the rule especially on dull days, or when the water is murky.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Jan 10). Comment on Daytime activity in Pleurobranchaea brockii by Ákos Lumnitzer. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5913

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Pleurobranchaea brockii

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