Favorinus japonicus on Hexabranchus eggs

September 25, 2007
From: Colin Ogden

Dear Bill,
Malcolm Gedrim, one of our local divers, has passed this photo on to me, and it shows something I have never seen before together with a Favorinus tsuruganus feeding on what I think is a Hexabranchus sanguineus egg ribbon.

Locality: Sodwana Bay, 19 metres, South Africa, Indian, 22 September 2007, Coral Reef. Length: 10 mm. Photographer: Malcolm Gedrim.

Please can you help with the ID.
Thanks a ton for all the help you have givenso far. It really is appreciated
regards
Colin

scubaco@iafrica.com

Ogden C M, 2007 (Sep 25) Favorinus japonicus on Hexabranchus eggs. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20796

Dear Colin,

It's almost certain that if you find an aeolid on an opisthobranch egg mass it will be a species of Favorinus, which all specialise on eating eggs. This is Favorinus japonicus. Interestingly we have a message from Dong Bum Koh showing the same two species together, from the other end of the Indo-West Pacific [#13700 ]

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Sep 25). Comment on Favorinus japonicus on Hexabranchus eggs by Colin Ogden. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20796

Factsheet

Favorinus japonicus

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