Floaters
Floaters are zombies that became bloated after spending a long period of time in the water. One was first encountered by the survivors at the Greene family farm in the TV series where it was found trapped in a well. Fearing that shooting the floater might result in polluting the well, the survivors decide to pull it out. This proves to be futile as it gets stuck on the lip and splits in half, the bottom part of its body (and most of its innards) falling back into the well.