Chromodoris kuniei -extra capsular yolk

May 1, 2006
From: James Lyle


Dear Dr. Rudman:

This Chromodoris kuinei was laying eggs at night, under a coral head; the image has been turned upright.

The animal is shaping the egg ribbon with the tip of its foot. The spiral is being deposited from the inside out, in a counter-clockwise fashion as viewed from above.

Locality: House Reef, Wakatobi Resort, 10 meters, Indonesia, Banda Sea, 16 October 2005, Coral wall. Length: 20 mm. Photographer: Jim Lyle.

Best,
Jim

jlyle@adelphia.net

Lyle, J.L., 2006 (May 1) Chromodoris kuniei -extra capsular yolk. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16465

Dear Jim,
Thanks for this interesting photo. I had suspected this animal has extra capsular yolk for some time but although photos seem to show it I didn't want to be guilty of wishful thinking, but your photos show identical dark orange-yellow blotches just like in photos of C. coi [see messages #7229, #14013]. The other thing is the purple colour on the underside of the coral head. I can't see any detail but the colour looks right for this species sponge food Chelonaplysilla violacea. If you by chnace have a photo showing any detail in the purple layer I would be interested.. It could of course be some other 'organic'  layer or even purple pigment in the coral colony, but the coincidence is quite stromg and sponge-feeding nudibranchs don't normally lay their eggs on living coral colonies - even the underside.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (May 1). Comment on Chromodoris kuniei -extra capsular yolk by James Lyle. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16465

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