Costasiella sp. 3 from Bali

October 28, 2008
From: Supapong Areeprasertkul

I have no idea in which group this stuff would be classified. I tried looking in the book of Helmut Debelius and found no clue.

Locality: Bali, 5 - 8 metres, Puri Jati, Bali, Indonesia, Bali, 16 August 2007, Sandy bottom. Length: 1 cm. Photographer: Supasate Areeprasertkul.

Thanks
Supasate Areeprasertkul

zybersup@gmail.com

Supasate, A., 2008 (Oct 28) Costasiella sp. 3 from Bali. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20529

Dear Art,

When you see aeolid-like sea slugs on this type of green algae then they are most likely to be a species of the sacoglossan genus Costasiella. The algae, with a post like 'stalk' and a flattened plate-like 'leaf' is likely to be a species of the green algal genus Avrainvillea.

I am pretty sure your animal is one I am calling Costasiella sp. 3. If you look carefully you can see a number of their spiral egg strings stuck to the algae, including one along the edge of the algae just behind the Costasiella.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 28). Comment on Costasiella sp. 3 from Bali by Supapong Areeprasertkul. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20529

Factsheet

Costasiella sp. 3

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