Strange critter from Greece

I found this critter under an old wood at -5m !

Has anyone seen something like this before or know what is it ?

Looks like it is something inside a sack .. like a mermaid purse ?

thats what i would guess this is .. a fish egg of some sort.

Looks like a tunicate of some sort. The internal gut is quite clear but I cannot see a second vent.

Very interesting! If you start to look under things yo'll start to find a whole new world of marine life there...

I bet Leslie will know whta this is!

Can you post a bigger image, or simply zoom and crop it more?

I am not an expert but I don’t think is an fish egg

It looks to be something like a tunicate but lets let the professionals expess their opinion!

I've seen plenty of similar things. I can't wait to hear what Leslie says about this strange thingy ma bob!

I'm puzzled by it too - looks like tunicate body with a polychaete inside because the branchial basket (used for filtering out food) is so dark. Or maybe it is a polychaete inside? Nicholas, would you mind sending me a high res file of the entire animal so I can send it to some friends who work with tunicates? My email is lharris[at sign]nhm.org

Wow, you've stumped worm girl - it must be something really unusual!

any news ?

Hi Nicholas - It's a tunicate. You can find an anatomy diagram here http://webs.lander.edu/rsfox/invertebrates...einascidia.html which will help in figuring out what the various structures are in your image. It may be that this animal is a common one for the Mediterranean but I have very few references for European waters.