Got some liverock for my new 120 gallon, and it's curing in the tank. One of the pieces had 3 small (about 3/8" from tip to tip) cnidarians of some sort. Anemones I think. I don't THINK they're aiptasia, since they're clear instead of brown (but they are juvenile), and one of them is showing stripes going down it's arms. Any idea if I should worry?