Re: Glossodoris atromarginata - feeding record [1]

November 19, 2009
From: Leanne and David Atkinson

Concerning message #19137:

Hi Bill,
We found this Glossodoris atromarginata on a sponge with its mouth clearly visible. This is quite a common nudibranch in the Port Stephens area but it often has its head pushed into an overgrown area so it is difficult to see what it is feeding on. We were excited to find this one with the mouth parts so clearly visible. There seems to be a small hitchhiker near its rhinophores which it has pulled in.

Locality: The Pipeline, Nelson Bay, Port Stephens, 3metres, New South Wales, Australia, Pacific Ocean, 14 November 2009, Sandy silty bottom with sea pens, sponges, ascidians, gorgonias, soft corals, hydroids and seaweed.. Length: 60 mm. Photographer: Leanne and David Atkinson.

Hope it is of interest.
Regards
Leanne & David Atkinson

atk@hunterlink.net.au

Atkinson, L. & D., 2009 (Nov 19) Re: Glossodoris atromarginata - feeding record [1]. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22800

Dear Leanne and David,

Feeding photos are always of interest and we can see how these sponge colonies can often be covered in 'gunk' which often hides their sponge identity.

I am pretty sure this sponge is a thorectid and most probably a species of Semitaspongia.

I can't see the 'hitchhiker' too clearly but the two white structures look like the egg sacs of a copepod crustacean, which may indeed be 'visiting' or living semi permanently on the nudibranch.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Nov 19). Comment on Re: Glossodoris atromarginata - feeding record [1] by Leanne and David Atkinson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22800

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