In most localities a given species of clam or coral persists essentially unchanged throughout a thick formation of rock, only to be replaced suddenly by a new and different species.

在大多数地方，某一种蛤蜊或珊瑚在厚厚的岩层中保持基本不变，只是突然被一个新的不同的物种所取代。

youdao

Any of various invertebrate animals resembling a plant such as a sea anemone or coral or sponge.

各种象植物的无脊椎动物，比如海葵、珊瑚或海绵。

youdao

From Canada to Tasmania, most coastal areas with sea grass beds, mangroves, or coral reefs can lay claim to a seahorse species or two.

从加拿大一直到塔斯马尼亚，大多有海草丛，海榄，或者珊瑚礁的近海区域都生存着一两种海马科动物。

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They kill parts of coral colonies or communities, so that simple organisms like algae can grow.

VOA: special.2010.08.10

Sick or dying coral affects the entire ecosystem of this special underwater area.

VOA: special.2009.04.22

Half our coral reefs are dead or dying. We've lost 90 percent of deep blue water,big game fish: the halibut,the tuna and the marlin that we all loved to eat.

VOA: standard.2010.08.04

In contrast, untreated animals and animals with grafts of coral alone or coral loaded with fresh bone marrow failed to heal the fracture.

BBC: Coral heals serious fractures

Hartman died in 1991, but the do-it-yourself ethos among U.S. expatriates continues to pave the way for better tourism in the Exumas, a chain of 365 Bahamian islands and cays (pronounced "keys"), low reefs of sand or coral.

FORBES: Blackbeard's Beach

Sheep with 25 mm lesions in their hoof bones were then implanted with the coral scaffolds alone or with coral scaffolds infiltrated with either expanded MSCs or fresh bone marrow.

BBC: Coral heals serious fractures