What is this in my chaeto?

[Socalx45]

I saw this and hoping anyone could tell me what it is? It's in my refugium, in my chaeto.

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[chueu]

quick guess - Sponge

 

[Ron Reefman]

First choice is some kind of sponge, second choice is some sort of algae.

 

[mcgyvr]

Its a sponge

 

[OldReefGuy]

+1 sponge