I have something digging in my tank. It likes to excavate little burrows under the edges of the LR on the sand. I'm not sure who is doing it. It's not harming anything, just kind of curious since I didn't think I had any burrowers.

Fish list:

Kole Tang
Flame Angel
Royal Gramma
Occy
Cleaner Wrasse
Flasher Wrasse
Green Mandarin
Lawnmower Blenny