Alien, I mean really Alien.

[dogscoff]

Animal, Plant, or Fungi

I'm pretty sure there are a number of microscopic squidgies that fit into none of the above, kind of the way a duck billed platypus doesn't sit happily as either mammal, bird or reptile. I think amoebas and protozoa are somewhere between fungus and animal, for instance. Bacteria and virii might be others. It's a long time since i had to know these things...