Number two is the leatherback turtle.

第二种是棱皮龟。

In the Eastern Pacific, these practices could drive leatherbacks to extinction in the next 60 years.

这种做法将在未来 60 年里导致东太平洋的棱皮龟灭绝。

At least to the same degree as the modern leatherback turtle.

至少和现代棱皮龟一样。”

Leatherback turtles travel great distances every year, both to eat and reproduce.

棱皮龟每年都要长途跋涉，为了觅食和繁殖。

These are leatherback sea turtle hatchlings, the largest species of turtle alive today.

这些是棱皮龟幼龟，是现存最大的海龟物种。

The leatherback is endangered. It can grow as large as 800 to 1,000 pounds.

梭皮龟已经濒临灭绝。梭皮龟最大可长到800至1000磅。

Also, the leatherback turtles, the largest turtles in the world, dive at the same depth.

此外，世界上最大的海龟——棱皮龟也潜到了同样的深度。

It was closely followed by the leatherback turtle, at 15Hz. Tuataras clocked in at 46Hz.

紧随其后的是棱皮龟，有15赫兹。

Leatherbacks are massive sea turtles dating back to the time of the dinosaurs.

棱皮龟是大型海龟，跟恐龙同时期出现。

The ancient turtle was much larger than today's largest turtle - the leatherback, which can reach 2 meters long.

这种古代海龟比当今最大的棱皮龟要大得多，棱皮龟体长可达2米。

Somewhat rare occurrence in South Carolina where a 500-pound leatherback sea turtle nicknamed Yawkey had become stranded on a beach.

重达500磅的梭皮龟约基在南卡罗来纳州的海滩搁浅，这种情况实为罕见。

Like the name suggests, the leatherback turtle, unlike its harder-shelled cousins, has a softer shell that's leather-like to the touch.

像它的名字一样，棱皮龟与它的兄弟姐妹们的硬壳不同，它有着一个摸起来像皮革一样的柔软外壳。

NOAA launched an aggressive plan to save leatherbacks in 2015 and is set to release a new action plan this month.

2015年，美国国家海洋和大气管理局发起了一份目标宏大的计划，旨在于本月发起一项新行动计划。

It had a shell made of tough skin over strut-like ribs, like the leatherback.

它有一个由坚韧的皮肤制成的外壳，上面有支柱状的肋骨，就像棱皮龟一样。

And today, the leatherback is the only skin-shelled sea turtle left.

而今天，棱皮龟是唯一剩下的带皮壳海龟。

Researchers say there was an 80 percent drop in one group of leatherbacks found off the California coast over the past 30 years.

科学家表示，过去30年间，加州海岸线上某个棱皮龟族群数量下降了80%。

But, the early success of the leatherback's family wouldn't last long.

但是，棱皮龟家族的早期成功并没有持续多久。

These killer whales were seen killing sperm whales, pygmy sperm whales and large Risso's dolphins, as well as scavenging on leatherback turtles.

这些虎鲸捕杀抹香鲸、侏儒抹香鲸和大型里索海豚，并以棱皮龟为食。

Genetic testing and round-the-clock surveys means every hatchling is accounted for and is part of the longest-running leatherback study anywhere in the world.

基因检测和 24 小时不间断的调查意味着每一只孵化的幼龟被计算在内，这也是世界上进行时间最长的棱皮龟研究的一部分。

Like the leatherback, Archelon didn't have a hard upper shell, or carapace.

与棱皮龟一样，Archelon 没有坚硬的上壳或甲壳。