Help identify this

[Tylenator]

Hi guys, I have something new in my tank can you guys help me identify it. Thank you

 

[Mr_Knightley]

What's the thing in need of ID? The pink bubble? That appears to be some sort of macroalgae, however if it has holes in it it may be a sponge or tunicate. I've seen that type of algae in some tanks before, it's very neat but I can't recall the name.

 

[Glenner’sreef]

Could be a mushroom? Does it have a stem?

 

[Tylenator]

yes there is