Mushroom?

[XxVooDooxX]

I just got this today and right now it's the best picture I could get. It's attached to an old hermit shell and there are two of them. Green and purple. Anyone know what kind they are? When they open I'll try to get a better picture

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[XxVooDooxX]

Oops!

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[XxVooDooxX]

When you put a mushroom frag in the tank, how long does it usually take foe them to open? If there is a general time frame

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[Badfishofbabylon]

It just depends my usually open by the next day, but sometimes the shrink. Just watch to make sure they don't ball up and stay closed for a day or two.
Here is some more info on the shroom, at least what i think it is from the pic

Saltwater Aquarium Corals for Marine Reef Aquariums: Blue Mushroom Coral