"Nick Maclaren" wrote in message
...

Yes. They are regarded as a separate kingdom, just like plants
and animals. Some of the things that were rolled into the 'plant'
kingdom have been separated off even more drastically, though I
forget the terms for the levels higher than kingdom.

As I recall, all multi-cellular organisms are now classified as
plants, animals, fungi or slime moulds, but with a few oddities
like the probable composite organism Euglena.

Which is in kingdom protista along with the slime molds, some seaweeds, and
pretty much all of the unicellular eucaryotes. It's a bit of a catch-all
kingdom to put all of the stuff that isn't an animal, plant or fungus (and
is, of course, eucaryotic).