Re: Okenia hallucigenia from sthn Queensland

November 11, 2008
From: Gary Cobb

Concerning message #22022:

Hi Bill and everyone!
Attached is another local Okenia hallucigenia and egg mass. The animal in the photo alongside [black background] laid the egg mass. The colour of the mass is always the same colour, an orangey-pink. The two photos you have now are ventral views!

Locality: Mooloolaba, Sunshine Coast, 12 m, Queensland, Australia, Pacific Ocean, 31 December 2005, Subtidal. Length: 13 mm. Photographer: Gary Cobb and David Mullins.

I have not seen O. atkinsonorum or O. stellata here yet. We will spend more time on the reef systems at the north end of Moreton Island, no telling what we'll find.
Cheers Gary

gary@nudibranch.com.au

Dear Gary,

Thanks for the quick follow up. From your photos, the egg mass of this species seems to be a more transparent colour than the very opaque pinkish colour of O. atkinsonorum [see #21274;  #9320]. Although the diameter of the total egg ribbon seems to be similar in both species, the actual ribbon in O. hallucigenia appears narrower, and there seem to be fewer eggs. It would be great to see a photo of the egg ribbon in the field.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Nov 11). Comment on Re: Okenia hallucigenia from sthn Queensland by Gary Cobb. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22030

Factsheet

Okenia hallucigenia

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