I had just cycled a new nano reef, and put in the cleaning crew when I saw something out of the corner of my eye. It looked kind of like a brine shrimp in color and size (but a little longer). I spotted him for about 3 seconds one night. Tonight, I saw him up by the glass and recognized that those deadly claws were starting to develope. I had mixed feelings about keeping him, but figured I (and everything else) would be better without him. As fate would have it he got sucked into the filter, and survived the impeller. As I write, he is sitting in a rocks glass. Don't know how long he'll survive in there, and can't tell what species he is. If anyone is in Chicago and wants him, let me know, sooner the better, not sure how I'll explain this to the wife tomorrow.