What is this?????

I thought I'd be clever and do a google reverse image search (you up load the image it looks for other versions of it) . . .

Apparently its a marine invertebrate!

It would appear that Mr Google doesn't know!
 
I *think I’ve seen something like this before but I have no idea what the explanation was. I’ve been wracking my brain to try and remember.
Has anyone google searched the image?
 
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