Costasiella kuroshimae from Heron Island

April 12, 2005
From: Julie Marshall

Dear Bill,

Bob Burn was recently at Heron Island [Great Barrier Reef] with me and he spent a lot of time sieving alga on the reef flat at low tide. Several of his finds were specimens of Costasiella kuroshimae which at present you have as only being found from Japan. The animal in the first picture was 3 mm and the other one was 5 mm.

Locality: Heron Island, Great Barrier Reef, Queensland, Australia
Depth: Low tide. Intertidal. Length: 3 mm and 5 mm
13 and 18 March 2005
Photographer: Julie Marshall

Best wishes,
Julie Marshall

Marshall, J.G., 2005 (Apr 12) Costasiella kuroshimae from Heron Island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Julie,
Thanks for these excellent photos of such small animals, and thanks to Bob for his diligent seiving! The photos certainly show the characteristic features of this species well. This is to my knowledge the first record of this species outside of Japan and so is a valuable contribution to our knowledge of the group.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Apr 12). Comment on Costasiella kuroshimae from Heron Island by Julie Marshall. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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