I need to know what this is!!

[urizen]

Just like the title says. what is this clearish thing growing from this rock??

 

[btldreef]

I have no idea, I'm commenting to simply push this back to the top for more people to look at, and I'm curious...
I want to say aiptasia, but it has no tentacles!

 

[meowzer]

If it has no tentacles...I'm gonna say a type of sponge....I have some weird clear stuff like that in my rocks...some of it almost looks like it has an opening too
thinking sponge

 

[jaxfishgirl]

ooh could it be a tunicate? mine kinda looks like that, but its greyish

 

[jaxfishgirl]

does it kinda look like this? ok, maybe not greyish