[2021] Have we figured out what zombies are yet?

Zombies being able to breathe underwater would point to necromantic magic, though, because that's not how biology works.

Not the voices. I meant that their limbs are moving. Human muscles don't do that without oxygen.

If a zombie or vampire has no heartbeat and does not breathe then it won't be moving it's limbs any more.

The only way around that is to leave biology behind and go for necromantic magic