Tsunamis can often become monster waves of more than 100 feet (30.5 meters).

海啸常常会掀起超过100英尺(30.5米)的巨浪。

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Nicknamed a "monster in the waves", he was the first man to swim under four minutes in the 400-meter freestyle.

绰号叫“水中怪物”的他，是第一个在400米自由泳中游进4分钟的人。

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She jumps inside and waves to the monster.

她就跳了进去，向怪兽挥手。

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During big south swells the beach area in view of the Teahupoo reef monster produces some fine waves, also great for beginners who can simultaneously watch the pros surf the big waves on the reef in the distance.

BBC: Learning to surf in the land of giants

Science editor Alan Boyle's blog: A fossil skeleton found in central Nevada's desert years ago has been identified as belonging to a 30-foot-long sea monster that ruled beneath the waves 244 million years ago.

MSN: Expedition finds 40 unknown gas seeps off US East Coast