When people catch sharks, they cut off their fins and throw the sharks back into the ocean.

当人们捕捉鲨鱼时，他们切下鲨鱼的鳍，然后把鲨鱼扔回大海。

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They were documenting the dorsal fins of sharks, as part of an identification program, when a 10-foot-long great white shark suddenly landed on their vessel.

那天在莫斯湾的船上他正在与其他六名船员正在进行对鲨鱼群背部鳍记录的识别项目，一只10英尺长的大白鲨突然间跃上他们的船舷。

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An estimated 38 million sharks are killed for their fins each year.

据估计每年有3800万条鲨鱼因为它们的鱼鳍被杀。

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It shows bloody images of fisherman cutting the fins off dead sharks then throwing them back in the water.

VOA: special.2009.04.03

Sharks are harvested for meat and cartilage, liver oil and,especially,for their fins.

VOA: special.2009.06.16

Asia's appetite for delicacies like sea cucumbers and sharks' fins seems limitless.

ECONOMIST: Galapagos

But when last month Ecuador's president, Rafael Correa, relaxed a ban on the trade in sharks' fins (a highly-prized delicacy in east Asia), he unleashed a storm of protest.

ECONOMIST: A stumbling approach to conservation

Because space is limited on fishing vessels and shark bodies are bulky and not considered as valuable, fishermen often catch the sharks, saw off their fins and toss the sharks back into the water.

CNN: Shark fin soup alters an ecosystem