identifying unknown invertebrate

phatfish

New Member
I was given live rock from a previosly established tank and I found this interesting little anemone looking critter. It is funny, because it only opens at night or when I turn the lights off. It is the size of a dime and when it opens up it has clear to white tentacle with pink tips. I don't have a picture, So if anyone has any idea what it might be, I would be very interested to know. Thanks
 
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