Marine scientists have completed the first ever census of the myriad creatures living in the world’s deep blue seas, a monumental accomplishment that took 2,700 researchers 10 years to accomplish. While the scientists didn’t count every single fish head, they now know more than ever before about what kinds of life inhabit the oceans, what lives where, and the number of creatures that remain. They hope that this sound science will produce sound decisions on environmental policy and fishery management.
The Census of Marine Life was officially launched in 2000. After a decade of work, some of the most interesting findings are the delineations of the ocean’s unknowns. For example, the Census upped the estimate of the number of known marine species to nearly 250,000, but still couldn’t estimate the total number of species in the ocean. It might be millions, the report says, or tens or hundreds of millions, when all the ocean’s microbes are accounted for.