Pinhead with Tail on Glass

[JNelsonCo]

This morning I found 25 of these Pinhead with Tail on Glass. They zig zag from 2 inches above the sand to about 4 inches below the waterline. I've watched them all day with no change. The tails are going in the direction of my flow.

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[EvanDeVita]

It’s some kind of worm, idk what they’re called. I had them, but any pest eating wrasse will take care of them in no time. I personally used a Naoko fairy wrasse (not the best choice but he worked) They are harmless too, I believe.