One of my guppies went missing too, and I had the same problem! Yes they most likely ate the carcass in your case because they could not have been sucked up the filter. But in mine, could a bristlenose pleco eat the carcass? Or would it have been my betta which also shredded another guppies tail?
If you have special fry food put some around the area of the decoration. Another thing I did was put a sinking algae wafer directly beside the decoration so they can hide if needed, and they can nibble at it once it softens and it will last them for a while. Good luck with the fry!
My very pregnant guppy recently started hanging out by herself and she got the boxy look, and pointy anal area, so I put her in a breeder box (I know that's not right but...) but now she has this huge pink circle thing coming out of her! Please what is it and what should I do???
Ps her tail is...