yo, ppls! :hi: my ghost shrimp keeps swimming up and down the sides of the tank, and looks like he is doing something, but I can't tell what. every other ghost shrimp i've ever had just walked around slowly on the bottom, sifting through the detritus for anything organic. he may be trying to grab at algae on the sides of the tank, but I don't know this for certian. has anyone experienced this with ghosts before, and can tell me what he's doing? (P.S. can you refer me a good summaratical article on ghost shrimp?)