Thorunna horologia from Sodwana Bay

June 9, 2005
From: Colin Ogden

Hi Bill,
Is this a Hypselodoris bullocki.? I have never seen this nudibranch before, but I noticed it twice today, on 2 very seprated reefs. They were both extremely small less than 1cm. Does that mean they have recently hatched, and is this seasonal.

Locality: Sodwana Bay, South Africa. Indian Ocean. Depth: 24 metres. Length: 10 mm. 05 June 2005. coral reef. Photographer: Colin Ogden

Best wishes
Colin Ogden

scubaco@iafrica.com

Ogden C M, 2005 (Jun 9) Thorunna horologia from Sodwana Bay. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13974

Dear Colin,
This is Thorunna horologia, a small chromodorid which doesn't grow much larger than a 10-15 mm. This animal has only been reported from Tanzania and northeasten South Africa, and then very rarely, so we can't say much about its biology and we certainly have no idea of its life history. Like many small nudibranchs it probably only lives a few months.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Jun 9). Comment on Thorunna horologia from Sodwana Bay by Colin Ogden. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13974

Factsheet

Thorunna horologia

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