Eight arms, one ancestor

Many of the world's deep-sea octopuses evolved from a common ancestor that still exists in the icy waters of the Southern Ocean, a study has shown.

Researchers suggest that the creatures evolved after being driven to other ocean basins 30 million years ago by nutrient-rich and salty currents.

The findings form part of a decade-long global research programme to learn more about life in the world's oceans.

Posted by David on November 9, 2008 10:28 PM