Ainimals are multicellular, eukaryotic organisms o the kingdom Animalia (an aa cried Metazoa). Aw ainimals are motile, meanin thay can muiv spontaneously an independently, at some pynt in thair lives. Thair body plan eventually acomes fixed as thay develop, althou some unnergang a process o metamorphosis later on in their lives. Aw ainimals are heterotrophs: thay must ingest ither organisms or thair products for sustenance.
Maist kent ainimal phyla appeared in the fossil record as marine species during the Cambrian explosion, aboot 542 million years ago. Ainimals are dividit intae various sub-groups, some o which are: vertebrates (birds, mammals, amphibians, reptiles, fish); molluscs (clams, eysters, octopuses, ink-fish, snails); arthropods (meggie-mony-feets, jennie-hunder-feets, insects, speeders, scorpions, keavies, lapsters, saund-clapper); annelids (yirdwirms, gells); spoonges; an loch-livers.