Unsure if this is a hitchhiker or ??!

AmandaMarie1116

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Started doing my water change and noticed quite. Few of these guys? I am wondering if it’s a hitchhiker or baby coral? It’s very interesting how fast it opens and closes up.
 

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vetteguy53081

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Can’t see video. Any still pics under white lighting?
 

PR_nano

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Hydroid, filter feeders but can irritate corals. See if you can remove while there are a few. They propagate rather quickly
 

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