What's This Thing?

[MrMashashin]

This came on my live rock today. I have absalutely no clue what the heck it is. It was flat when I put it in the water and now its all poofy.

 

[Navarre]

Looks like a mushroom polyp. Give it a few days to adjust and it will open up, then we can give a better chance at giving a better ID

 

[MrMashashin]

oh thats cool! The guy was going to charge me extra for polyps and shrooms but he missed that one!