Suppose my pet happens to be a dolphin.  Are we saying that the afterlife also contains fish?  If so, do they swim around in some sort of water environment?  After all, we imagine that our pet dog or cat, after they die, are happily romping around just as they did while alive.  Stands to reason my pet dolphin would be swimming somewhere.  

I wonder how I would recognize my dolphin friend.  They all pretty much all look alike.