What is this critter?

[ElliottM]

I apologize if this should be posted elsewhere, but I didn't see a more appropriate forum in which to ask this question. I dove off Sydney last month and saw this thing but haven't been able to identify it. What is this?

https://h70wua.dm2301.livefilestore...2p-L8AnMEXKxrF-tUQ_PKhEzI_qfYcvoY/Unknown.jpg

BTW, inserting the image isn't working for me, so trying to add the hyperlink too.

 

[tursiops]

Sorry, I'm not going to sign into some site in order to see your picture.
Try inserting it again.

 

[ElliottM]

sorry about that. does this link work for you?

 

[MaxBottomtime]

 

[ElliottM]

Thank you, MaxBT. Now, who knows what this is?

 

[tursiops]

Nudibranch, possibly Limacia.

 

[ElliottM]

Thanks, tursiops. I thought it might be a nudibranch as well, but i'm not so sure. On the same rock I did take a photograph of a Glossodoris atromarginata nudibranch. I'm still digging into this and will post an update if I learn anything new.

 

[MaxBottomtime]

Colonial ascidian, Polycitor giganteus.

 

[ElliottM]

Colonial ascidian, Polycitor giganteus.

woohoo - that's it! thank you very much!

may I ask how you determined that? I am still trying to identify a couple other things I photographed on the GBR, and I could benefit from your technique.

 

[MaxBottomtime]

I thought it was a tunicate so I Googled Australia tunicates. Several images came up including this one.