Used to really enjoy watching my tiger snapping shrimp with his YWG pal. They were pretty big (5" on the YWG and the shrimp had to go 3" plus). Dang shrimp would take snails and stuff them to decorate their cave (wouldn't kill them outright, just locked them in so they would starve). Once a month or so I'd clean out a dozen shells. Still great fun to watch. Lost them earlier this year.
Now i have a Yasha Goby with a Red Banded shrimp because I figured smaller wouldn't hurt the snail population. That was true but now I haven't seen either in two months since I put them in tank. Once in a while I'll see the shrimp molt and I did see the goby tail sticking out of snail shell a week ago. All in all, wish I stayed bigger.