Can anyone tell me what this is? We noticed it a couple of weeks ago coming out of the back of our rockscape. It has slowly moved about a foot or so over this time through our sandbed. I have no clue what it is. My guesses are that it's a ricordea that we had from our old tank but went missing when we transferred everything into this tank. My other guess is that it may be an anemone. We used to have a green bubble tip that disappeared. But it's not making much of an effort to get on the rocks. Any ideas or advice of what we should do with it?
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Matt
Matt