I got a 12 gallon nano tank a few weeks ago, and in haste, bought FOUR peppermint shrimps for it. I decided that I didn't want them, and that they would probably eat any coral I put in there down the road. To get them out, I had to remove 12 pounds of liverock. I scooped them up, put them in a bucket, and took them back to the LFS. They tossed them into a quarantine tank. They were white as a ghost! Just like ghost shrimp, but otherwise fine. I guess stress will turn a shrimps colors. I'm hoping them get pink again in a few hours:-/