The hidden world of the ocean's tiniest organisms has been revealed in a series of papers Science. An international team has been studying samples of plankton collected during a three-year global expedition. They have so far found 35,000 species of bacteria, 5,000 new viruses and 150,000 single-celled plants and creatures. They believe that the majority of these are new to science. Planktons are minute organisms, but all together they make up 90% of the mass of all of the marine life in the oceans. They include viruses, bacteria and single-celled plants and creatures (protozoa).They are the producers of the food chain and produce, through photosynthesis, half of the oxygen we breathe.
By Montana Dalmau