Sea urchins are perhaps best known for their armor of spines.

海胆也许最出名的是它们的刺甲。

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Sea urchins are perhaps best known for their armor of spines.

海胆也许最出名的是它们的刺甲。

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Rock lobsters prey on sea urchins, and increased rock lobster densities coincided with significant decreases in urchins.

岩石龙虾以海胆为食，而岩石龙虾密度的增加正好与海胆数量的显著减少相吻合。

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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

Now he goes after sea urchins and collects kombu seaweed, though wholesalers won't pay much for either.

CNN: ASIANOW - TIME Asia

Bottom-feeders prey on young lobsters, but they also prey on sea urchins.

ECONOMIST: Lobsters in Maine

The skeletons of brittlestars, which are sea creatures related to starfish and sea urchins, contain thousands of tiny lenses that collectively form a single, distributed eye.

ECONOMIST: REPORTS