I've got a few of these things growing, usually around corals. This is a photo of a bird of paradise, these tubes grew out from around the fragged edges. At first I thought they were just how the coral was healing itself. But now I'm wondering whether they are vermatid snails. I don't see any snail like shell at the base, however. Just wanted to confirm before I start crushing the base of the tubes. I've never seen any mucous or anything coming out of the tubes.
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