University of Tasmania scientist Scott Ling says there is evidence that they have been eating the sea urchins.

VOA: special.2009.08.25

On one recent day, one thousand five hundred sea urchins got a new home in deeper water.

VOA: special.2009.08.25

The American state of California is another area where long-spined sea urchins have been destroying kelp forests.

VOA: special.2009.08.25

Mister Ling says the hope is that they will prevent further development of sea urchins.

VOA: special.2009.08.25

The state has employed divers to remove urchins along its southern coast.

VOA: special.2009.08.25

The scientists say abalone and lobsters are among the urchins' victims.

VOA: special.2009.08.25

For example,urchins are ruining coral reefs in waters near Australia.

VOA: special.2009.08.25