I've had a YWG and a pistol shrimp pair for a month or 2 now and my goby is usually guarding the front or back entrance of the burrow but since yesterday when i did a water change i haven't seen the YWG but i have seen the pistol shrimp, so im kinda worried but its only a day in since he went missing, could of the pistol shrimp blindly shot the goby not knowing it was the goby since my 6 line some times goes in the burrow to roam around, i always hear popping so i never care since hes usually shooting a snail or hermit out of the burrow. Also when i was looking at the back tank i seen sand moving by the entrance and my pistol shrimp got freaked out by it and went into the burrow. Do YWG bury them selves like yellow choris wrasses do?