Please ID

[sanchezkk]

What could this yellow colored thing be. It's the best picture I could come up with right now?

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[birdsnest]

a sponge

 

[sanchezkk]

Really, cause I already have two separate pieces of rock that are sponges? I have a full grown sponge and a rock that spawned one and now this one. My water quality must be ideal.

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[Feivel]

Looks like 3 mushrooms. A yellow sponge and possible stromatella snail just beneath it.

 

[Reefing Madness]

a sponge

Agreed