Houdini

I have 4 guppies, well one died for no apparent reason 2 weeks ago but the remaining one male and two females are fine, all of a sudden 2 days ago the larger one, the male, vanished, it fricken disappeared, I cant find it anywhere. I have a community setup, the ONLY 2 fish big enough to eat it would be the black molly or the clown loach, and quite frankly they just wouldnt do it, he was the biggest one to, i dont think they physically could...anyways my filter is screened/capped of at the end so thats not an option, my gravel vacum has a valve/screen i checked that as well, nothing...There a lid on the tank so it didnt jump out, my entire bottom of my tank is caves, wether it be stone/slate or pvc or store bought plastic ones, i checked all them and cant find it anywhere..........has this ever happened to anyone else??????