Long tentacle-y things in my tank?
We put some new live rock in the tank on Sat. Yesterday I noticed these long denticles moving sand under the rock. They are approx. the diameter of fishing line. Clear for the most part, somewhat opaque. Some of them are two or more inches long and they come from one area like spoke on a wheel. Anybody have a clue? Are they good, bad, or indifferent?
Trying to add pic to follow.
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