Relative amounts of biomass in oceans - bacteria and viruses over 90% | Viruses, Immunology & Bioinformatics from |

Viruses are by far the most abundant biological entities in the oceans, comprising approximately 94% of the nucleic-acid-containing particles. However, because of their small size they comprise only approximately 5% of the biomass. By contrast, even though prokaryotes represent less than 10% of the nucleic-acid-containing particles they represent more than 90% of the biomass.

Via Dr. Stefan Gruenwald