Anyone know what this pod Dome looking thing is?

[R33fDaddy]

While doing my Aiptasia inspection I spotted this Dome looking thing with a hole in the middle of it. Almost looks like a closed Zoa but I fear this is some kind of pest. Any ideas?

 

[Jekyl]

Sponge?

 

[R33fDaddy]

Sponge?

I have no idea. Are they bad?

 

[vetteguy53081]

Pic fuzzy but appears to be a tunicate. Considered safe but can grow larger

 

[ZoWhat]

Tunicates = safe, a good sign of good parameters and a maturing tank

Tourniquets = a bad sign that something with your project went horribly wrong when EMTs are standing over you


.

 

[R33fDaddy]

Tunicates = safe, a good sign of good parameters and a maturing tank

Tourniquets = a bad sign that something with your routine maintenance went horribly wrong


.

Which one do you think it is?