I recently started a 25 gal tank and bought some live rock from the LFS about 5-6 weeks ago. Today while watching my peppermint shrimp eat I noticed a worm-like thing come out of the rock toward it all sneaky like, It looked like a tube but was red and white striped and had clear tentacle like things coming out of the opening of the tube it was quite long about 2" and still wasn't all the way out of the rock. What is this? Should I be worried? I only have 1 damsal 2 peppermint shrimp and 2 turbo snails. Thanks for th help!

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