Fiona pinnata from Korea

June 21, 2002
From: Dongbum Koh

Dear Bill
I took this picture in Mun islet, Cheji Is. in May 2000, 20m depth. It attached its eggs (discoid white capsule) on the surface of this glass bottle. I can`t find this seaslug in the books. I think its very rare because it is the 1st time I have found it during about 1000 times diving in the Cheju area, S. Korea.

Could you help me identify it please?

Best regards.
Dongbum, Koh

drkoh@seasee.co.kr

Koh, D.B., 2002 (Jun 21) Fiona pinnata from Korea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7284

Dear Dongbum,
This is Fiona pinnata. It is not surprising that you have not seen it before, because it lives on floating objects, such as driftwood, fisherman's floats etc, and feeds on stalked barnacles, such as Lepas. I once found thousands on a large (10-15m long) log washed up on a deserted beach. The log was covered in stalked barnacles, Fiona and its eggs - not much wood visible at all. My camera, as always, was a 5 kilometre walk down the beach with the tide coming in. So I never did photograph that find.

This species is found worldwide - but usually on driftwood on sandy beaches - which are not the usual place for divers to look for nudibranchs.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Jun 21). Comment on Fiona pinnata from Korea by Dongbum Koh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7284

Factsheet

Fiona pinnata

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