Cryogenian first appearances

Animals are multicellular, eukaryotic organisms belonging to the biological kingdom Animalia (). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. Animals form a clade, meaning that they arose from a single common ancestor. Over 1.5 million living animal species have been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77&

thumb| The carnivorous ping-pong tree sponge, Chondrocladia|Chondrocladia lampadiglobus thumb|Monanchora arbuscula ([[Poecilosclerida)]] thumb|Geodia barretti ([[Tetractinellida)]] thumb|Chondrosia reniformis ([[Chondrosiida)]] thumb|Spongia officinalis ([[Dictyoceratida)]] thumb|Spongilla lacustris ([[Spongillida)]]