13,000 Species Documented in Marine Census
A team of international researchers has released the results of an extensive survey of the Antarctic and Arctic oceans.
The census showed 7,500 species in the Antarctic and 5,500 in the Arctic. The total number includes several hundred thought to be newly discovered species. In addition it was discovered, astonishingly, that 200 or more of species are common to both oceans - though they live 11,000 kilometers from one another.
