If that wasn't bad enough, he also had to watch out for the aggressive Leopard seals and killer sharks, that inhabit the freezing waters.

更糟的是，他还不得不注意防范在这些寒冷海域中生活的豹纹海豹和鲨鱼的攻击。

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Studies show that lightning is a far greater killer than sharks, at least in the United States.

研究发现闪电远比鲨鱼这个杀手厉害多了，至少在美国是这样的。

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The fish are not sharks or killer whales.

这些鱼并不是鲨鱼或逆戟鲸。

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Killer whales might be able to eat them, Watanabe suspects, but Greenland sharks usually stay within deep water that killer whales do not frequent.

MSN: Presenting the world's slowest shark - Technology & science - Science - DiscoveryNews.com | NBC News

The waters also support the UK's only resident population of killer whales and two feeding and breeding hotspots for basking sharks, the world's second biggest fish.

BBC: West coast whales, dolphins and sharks to be surveyed