I was rearranging my female tank. As I was about to put plant down, I looked to through the front of the tank to make sure one of my ladies weren't in the way and I see a shrimp just crawling along. I placed everything in the tank before I saw him. I'm lucky I didn't squish him. I bought two of them like five months ago, and I guess I forgot about them. HeeHee Ooops...