Re: Eggs of Okenia zoobotryon

February 5, 2009
From: Leanne and David Atkinson

Concerning message #16798:

Dear Bill,
We found some more Okenia zoobotryon on their bryozoan Zoobotryon verticillatum after we saw eggs on it. One of them appeared to be laying eggs. In the upper picture where we are looking down from on top we think we can see on the right hand side a tiny transparent reproductive duct extruding the eggs. On this occasion we couldn't find any Okenia pellucida on the same bryozoan or any nudibranchs on the other Zoobotryon verticillatum colonies we saw with egg strings. We hope this is of interest.

Locality: Fly Point, Port Stephens-Great Lakes Marine Park, Port Stephens , 12 metres, New South Wales, Australia, Pacific Ocean, 25 January 2009, Sandy bottom with scattered sponges, bryozoans, ascidians, soft corals and gorgonians. Length: 8 mm approximately. Photographer: Leanne and David Atkinson.

Regards,
Leanne & David Atkinson

atk@hunterlink.net.au

Atkinson, L. & D., 2009 (Feb 5) Re: Eggs of Okenia zoobotryon. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22203

Dear Leanne and David,

I have included a close-up showing the transparent structure you refer. I suspect if it is partof the reproductive organs it is a small flap at the edge of the reproductive opening rather than a duct

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Feb 5). Comment on Re: Eggs of Okenia zoobotryon by Leanne and David Atkinson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22203

Factsheet

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