Chelidonura hirundinina from the Kermadecs

May 26, 2006
From: Ian Skipworth

Hi Bill

Here's Chelidonura hirundinina from the Kermadecs. I guess it's another one of those slugs which seems a bit exotic for New Zealand waters but is probably quite common in the tropics.

Locality: Raoul Island, Kermadec Islands, 12 m, New Zealand, Pacific Ocean, 19 March 2006, Rocky reef. Length: 12 mm. Photographer: Ian Skipworth.


Skipworth, I.R., 2006 (May 26) Chelidonura hirundinina from the Kermadecs. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Ian,
Yes this is indeed a tropical species found in both the Indo-West Pacific and the tropical west Atlantic. It certainly has not been reported from New Zealand 'proper' and as far as I can check it hasn't been reported from the Kermadecs either.

I have added close-ups of both your animals as they show to of the colour variants, the onr on the left simple lines, and the one on the right with spots as well, and the lines broadening into wider patchy bands. Such differences in early days were considered enough to make them different species.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (May 26). Comment on Chelidonura hirundinina from the Kermadecs by Ian Skipworth. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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