White cotton on coral

[ccajigas07]

Can anyone tell me what this is and should I be worried the white cotton looking stuff on the right of the coral

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[Reef Pets]

Looks like sponge to me. Some species grow really fast while other don't. You might wanna pick it off and put it in your refugium if you have one.

 

[skinz78]

+1 Sponge.

 

[Reefing Madness]

+2 Sponge