Identify anyone?

[saltcrazy]

Saw this under one of my pieces of liverock. Is it a sponge of some sort ?




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[JohnK]

I'd say sponge.

 

[wdebenedettojr]

100% agree. Sponge

 

[Turbosnail]

+1 sponge.

 

[s_kelley]

Very cool looking sponge,

 

[saltcrazy]

cool!