We all know farm animals make sounds—the cow goes "moo", the duck goes "quack", and the dog goes "woof".
我们都知道农场动物会发出声音——母牛发出“哞哞”声，鸭子发出“嘎嘎”声，狗发出“汪汪”声。
But what sounds do fish make?
但是鱼会发出什么声音呢？
Scientists are working to answer this question by listening to and recording the sounds that fish make underwater.
科学家们正致力于通过倾听和记录鱼类在水下发出的声音来回答这个问题。
So far, they have discovered a surprising number of fish sounds, like thumps, burps and grunts.
到目前为止，他们已经发现了数量惊人的鱼类声音，比如重击声、打嗝声和咕哝声。
Aaron Rice, who studies animals living in the ocean, is one of the scientists.
研究海洋生物的亚伦·赖斯（Aaron Rice）就是其中一位科学家。
He says that while fish sounds are much simpler than birdsong, there are still many different kinds.
他说，虽然鱼类的声音比鸟鸣声简单得多，但仍然有许多不同的种类。
Why do fish make sounds?
鱼为什么会发出声音？
They do so for the same reasons as land animals: to find food and attract mates.
它们这么做和陆地动物的原因相同：为了寻找食物和吸引配偶。
Fish produce sounds in different ways.
鱼类以不同的方式产生声音。
Glasseye snappers shake their swim bladders to make sounds.
大眼鲷通过震动它们的鱼鳔来发出声音。
Groupers create deep, loud calls with fast-moving muscles.
石斑鱼利用快速运动的肌肉发出深沉而响亮呼叫声。
Fish sounds are often very quiet, so it's hard to hear them underwater.
鱼类的声音通常非常微弱，所以在水下很难听到它们。
Scientists use special underwater microphones and video cameras.
科学家们使用特殊的水下麦克风和摄像机。
They put these tools in coralreefs near Hawaii and Curaçao.
他们把这些工具放在夏威夷和库拉索附近的珊瑚礁里。
The cameras have already recorded hours of underwater video, helping scientists identify more than 70 species of fish!
摄像机已经记录下了数小时的水下视频，帮助科学家识别了70多种鱼类！
Scientists are building a large library of fish sounds.
科学家们正在建立一个大型的鱼类声音库。
They hope it will be used to help people take better action to protect endangered fish and coralreefs.
他们希望这将被用来帮助人们采取更好的行动来保护濒危的鱼类和珊瑚礁。
English Text
We all know farm animals make sounds—the cow goes "moo", the duck goes "quack", and the dog goes "woof". But what sounds do fish make?
Scientists are working to answer this question by listening to and recording the sounds that fish make underwater. So far, they have discovered a surprising number of fish sounds, like thumps, burps and grunts. Aaron Rice, who studies animals living in the ocean, is one of the scientists. He says that while fish sounds are much simpler than birdsong, there are still many different kinds.
Why do fish make sounds? They do so for the same reasons as land animals: to find food and attract mates. Fish produce sounds in different ways. Glasseye snappers shake their swim bladders to make sounds. Groupers create deep, loud calls with fast-moving muscles.
Fish sounds are often very quiet, so it's hard to hear them underwater. Scientists use special underwater microphones and video cameras. They put these tools in coralreefs near Hawaii and Curaçao. The cameras have already recorded hours of underwater video, helping scientists identify more than 70 species of fish!
Scientists are building a large library of fish sounds. They hope it will be used to help people take better action to protect endangered fish and coralreefs.