|Abstract from DBPedia||
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). All animals are motile, meaning they can move spontaneously and independently at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance. Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. Animals can be divided broadly into vertebrates and invertebrates. Vertebrates have a backbone or spine (vertebral column), and amount to less than five percent of all described animal species. They include fish, amphibians, reptiles, birds and mammals. The remaining animals are the invertebrates, which lack a backbone. These include molluscs (clams, oysters, octopuses, squid, snails); arthropods (millipedes, centipedes, insects, spiders, scorpions, crabs, lobsters, shrimp); annelids (earthworms, leeches), cnidarians (jellyfish, sea anemones, corals), and sponges.
* 動物界（どうぶつかい） に分類される生物のこと。本項で詳述する。 2.
* 俗語として植物の対置語、「けもの」の意味、動物界に分類されるヒト以外の生物を指す言葉として使われる。 動物（どうぶつ、羅: Animalia、単数: Animal）は、動物界（どうぶつかい） に分類される生物のこと、またはその総称。真核生物に含まれ、一般に運動能力と感覚を持つ多細胞生物である。