I wish I could have gotten a better shot, but I let a friend use my macro lens.
I can't imagine how this got into the tray, which is about 2 1/2" deep, on a small table 3' high away from everything.
I use bottled, distilled water, and rarely see any creepy-crawlies in the house.
If it's a isopod,slater,woodlouse or pill bug, where might it have come from and could it indicate a problem?