ID of odd hijacker.

[dml931]

Can someone ID this please. I can't find anything online. Thanks

 

[Sugar Magnolia]

Really can't tell. The pic is too blurry.

 

[MARINECRITTERS]

As sugar said, it is too blurry for a correct ID. From the look of it, it is harmless. To me it is some sort of calcareous tube or sponge.

 

[ingtar_shinowa]

Looks alot like a sponge

 

[cloak]

Large vermetid snail?

 

[squishifishi]

are we looking at the green blobbish thing or something else? I know there's a big arrow(thank you for that) but you know... I'm clueless that way.
I beleive you mean hitchhicker btw