<P> It is estimated that the most numerous bacteria are of a species of the Pelagibacterales (or SAR11) clade, perhaps Pelagibacter ubique, and the most numerous viruses are bacteriophages infecting these species . It is estimated that the oceans contain about 2.4 × 10 (24 billion billion billion) SAR11 cells . </P> <Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (December 2014) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (December 2014) </Td> </Tr> <Ul> <Li> Mammals by population <Ul> <Li> Artiodactyla (even - toed ungulates) </Li> <Li> Carnivora (carnivorans) </Li> <Li> Cetacea (cetaceans) </Li> <Li> Chiroptera (bats) </Li> <Li> Perissodactyla (odd - toed ungulates) </Li> <Li> Primates </Li> </Ul> </Li> </Ul>

The population of the following is maximum on the earth