So I've been having these really annoying snapping sounds coming from a piece of rock in the corner, right in front. At first I thought it was a mantis, but after hearing the repetitive snaps, I concluded that it was a pistol shrimp. I've never seen it, until today. I was staring at random things and my tank, heard the sound, so decided to shine a flashlight in some of the holes. And it seems that there is a small tunnel through-out the rock. I saw something red and white, with some antennas for a second, then it ran away. About a minute later I did it again, and there he was. A small pistol shrimp probably around 3/4"-1", with a bright red and white pattern on his body. If I somehow manage to catch him, he will go into my extra tank and I'll see if I can get a watchmen for him to pair up with.