刺冠海星是一种以珊瑚虫为食的珊瑚礁捕食者。

The crown of thorns starfish is a coral reef predator that preys on coral polyps.

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这是一种生长在澳大利亚的非常稀有的树——冬花，但它更广为人知的名字是夜冠橡树。

It's a species of a very rare tree that grows in Australia, Eidothea hardeniana, but it's better known as the Nightcap Oak.

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有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。

One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.

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