Chromodoris tinctoria - reproductive organs

June 12, 2003
From: Dong Bum Koh

Dear Bill,
Here is Chromodoris tinctoria from Jeju island, South Korea. Chromodoris tinctoria is very common in this area but it has taken me more than 10 years experience to get this fine close-up shot of mating.

01 June 2003. in Moon islet in Jeju Sth Korea
8m depth. W/T : 19 degrees
Photographer: Dong Bum Koh

Dong Bum Koh

drkoh@seasee.co.kr

Koh, D.B., 2003 (Jun 12) Chromodoris tinctoria - reproductive organs. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10142

Dear Dong Bum,
Thanks for these nice photos. Since these animals can function as both male and females at the same time, I have added some arrows to one of the photos to help identify the structures. In the photo with arrows, the animal on the left of the photo has its penis inserted into the vagina of the right animal - the arrows are showing the direction of sperm transfer. The penis of the right animal, however, is only partially everted [lower duct in photo] and not inserted into the vaginal duct of its partner.

Although nudibranchs can act as both male and female simultaneously, this does not always occur. It's possible, in this example, that transfer of sperm from the right animal to the left animal may not occur, but then again it may just be that the right animal is a bit slow at getting organised.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Jun 12). Comment on Chromodoris tinctoria - reproductive organs by Dong Bum Koh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10142

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