Watch out of Venezuela on the critically endangered leatherback turtles.

请关注委内瑞拉极度濒危的棱皮龟。

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In the Pacific, the number of leatherback turtles has plummeted in the last three decades.

在太平洋，菱皮龟的数量在过去三十年呈直线下降的情况。

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But until now, nobody quite appreciated just how good leatherback turtles were at navigation.

但直到现在，还是没人能够欣赏菱皮龟在航行中的好处。

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The leatherback turtles feed on jellyfish so they bring the balance - if they are not there, it means there will be a jellyfish explosion and that will not be good for the whole functioning of the marine environment."

VOA: standard.2010.07.15

Leatherback turtles weigh around 600kg (95st) and their shells can be up to two metres (6ft 7in) long.

BBC: New law to protect Puerto Rico leatherback turtles

Reported sightings of leatherback turtles are increasing off Wales, with the reptiles thought to be drawn by high numbers of jellyfish.

BBC: Leatherback turtle sightings up in west and north Wales

One study in 2004 estimated leatherback turtles had only a 50 percent chance of avoiding being accidentally snared by a deep sea fishing line each year.

CNN: Turtles in race to beat extinction