probably still settling in, hope you don't have any aggressive predatory fish with him in the tank. i just ordered one and read they gain confidence when paired up with a pistol shrimp and share a burrow. i don't know how much time they spend out in the open as many smaller fish can be shy in nature this way they aviod many predators in the wild. looking forward to getting mine and may get a pistol shrimp also if he won't kill anything i have in my tank already! Good luck