I've had a yellow watchman in my 10g tank for about 6 months, along with a purple firefish. When I first got it, it was very shy and wouldn't really come out to eat. I paired it with a candycane pistol shrimp about a week after I got it and that eased its shyness a bit and it has since been thriving in my tank, getting nice and fat. It was still on the shy side and would run for cover under a rock about half the time I would come up to feed the tank. There were also many times where it would go into hiding for a day or so before I'd see it again. Last friday I added a new blenny to the tank. I saw the watchman saturday morning but have not seen it since. The pistol shrimp has come out a few times for food but no sign of the watchman. The blenny does seem to be more aggressive than I anticipated but I'm not sure its aggressive enough to have killed the watchman. My guess is that the watchman is in serious hiding, and the pistol might be taking it food. How long can a fat yellow watchman stay in hiding before starving to death?