This is Chum Ming! (I crack myself up with these names 🤣)
He looks dead but his body is very much alive with a fishbone cactus! (aka ric rac cactus, aka disocactus anguliger)
The mouth is open and serve as a drain hole,
It's a 3 piece set you can adjust while it grows! Yes, I'll include the plant this time!!! Depending when he gets sold, cactus may have grown/look different.