Got a chunk of rock from LFS and had a stowaway on board. He looks like he's from the mantis type shrimp family. He's about a half inch long and striped in yellow, white and black, like a bee. LFS says bumble bee shrimp, imagine that. He comes out during the daylight and doesn't seem to bother anything. I will try to get a pic if needed. Any info appreciated. Yank 'em or leave 'em?