I am not exactly sure how long I have had my Tiger Pistol Shrimp, at least a year now. When I got him he was much smaller and lately I noticed he is just as big as his Watchman Goby, which is now quite large. He has been eating very, very well as of lately I have been feeding him scallop. Around two days ago I noticed I have not seen him, the holes into the entrance are getting smaller but the Goby is still in there. Are their higher chances he is dead or molting? How long should I wait before I find a replacement if he passed away? Everything in the tank is extremely healthy and my parameters are spot on.