The lights were off in the reef tank.
I had to turn some of them on to see what I was doing, and to fix the problem. I found this guy scurrying across the glass.I have several of them in my tank. I did not buy them so they must have come in as hitchhikers on corals I added to my mini reef.
The quick little guy struggled on through the blizzard of sand and bits of shredded cheatomorph...
