Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. Their are about approximately 8.7 million species on Earth. They believe that 1-2 million of those species are animals. The list below shows that these animals can live the lingest.