Any idea what these are?

[Karli Matt Wilkes]

Can someone help me ID these please? I have 12 in my tank (that I can see) and they are multiplying pretty fast. Looks like they close up like an anemone when touched.

(This is my first post ever so if there's another area to post ID questions please let me know.)

 

[Claus84]

from the 2 photos on the right they look like tunicates, not 100% on that though. If they are they are harmless filter feeders

 

[Karli Matt Wilkes]

I've had another person think that also from my local page. I was thinking tunicates have more of a defined inlet and outlet. But you're probably right.

 

[Tahoe61]

I am going with Tunicates as well. Those are pretty cool.