Big hydroid? Crazy starfish?

[MoshJosh]

My local fish store has an outbreak:

 

[Cthulukelele]

To me that looks like a baby aiptasia that has attached to the glass

 

[dwest]

Interesting. I’m guessing anemone? I’m wondering if it’s hard like starfish or squishy…

 

[ISpeakForTheSeas]

Yeah, those are anemones of some variety - would need white light pics to attempt an ID beyond that though.