Mora C, Tittensor DP, Adl S, Simpson AGB, Worm B (2011) How many species are there on Earth and in the ocean? Mora C, Tittensor DP, Adl S, Simpson AGB, Worm B (2011) How many species are there on Earth and in the ocean? PLoS Biology 9: e1001127 doi:10.1371/journal.pbio.1001127 Mora-et-al_2011_PlosBiology.pdf View | Download