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

VOA: special.2009.08.25

A fronde was a kind of a slingshot that Paris street urchins used to shoot fancy people with rocks as they rode their carriages through the muddy streets of Paris.

ronde类似于,某种弹弓,巴黎的顽童们用他们的弹弓"袭击",那些驾着马车穿过巴黎泥泞街道的人们

耶鲁公开课 - 欧洲文明课程节选

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