水下缤纷夜生活

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It is 7 o’clock on a balmy evening off Key West注.

A group of divers head out to experience some of the local night life. Bob Holston has been teaching scuba diving in Key West since 1969.

Holston: We’re the oldest shop in the Keys, so on really nice days we just used to lock the doors and put a sign up, “Let’s go diving”.

Holston has 1)logged over 3,000 dives, roughly 500 have been at night.

Holston: We do a twilight dive just before dark, so that you can begin to watch the transition of what’s taking place in the marine life.

Twilight on an Atlantic coral reef is like 2)rush hour. The 3)nocturnal animals are waking up, while the day fish are finishing dinner before finding a place to settle in for the night.

Like a scene from a science fiction movie, an

underwater light show transforms the dark ocean.

Holston: The corals look 4)sulphur because the

5)polyps come out and start feeding on the 6)plankton coming by. You see a little bit more color because of your dive lights.

7)Spiny lobsters, that spend most of their day

hiding under 8)ledges, wander out into the open. This area is part of a national marine 9)sanctuary and the lobsters can’t be harvested.

At night, 10)Porcupine Fish are on guard. Once startled, it fills itself with water, growing to more than twice its normal size. With 11)quills extended, it

presents itself as a less attractive meal to 12)predators.

Holston: It would be a combination of being

weightless and being able to fly while…while you’re looking through a 13)kaleidoscope of fish life, but you’re

weightless, just like an astronaut would be.

14)Swarms of small 15)zooplankton are attracted to the bright underwater lights. These tiny 16)crustaceans form the most 17)abundant group of animals on earth. A Caribbean Reef Squid is also attracted to the light, maybe to feed on the zooplankton.

Holston: Most people seem to feel it’s probably the most unique dive experience they’ve had by going out at night. Now they’ve put all of this energy into being worried about it, and they get down there and within four or five minutes they’re just 18)enthralled with what’s happening around them.

一个温暖宜人的夜晚，七点，（美国佛罗里达州）基韦斯特。一群潜水者正要出发去体验当地的夜生活。鲍伯・侯斯顿从1969年起就在基韦斯特从事潜水教学工作。

侯斯顿：我们是佛罗里达群岛上最老的店子；天气好的时候，我们常常锁上门，挂出一个牌子，上面写着：“一起去潜水吧。”

侯斯顿有记录的潜水已经超过三千次，其中大约有五百次是在夜间进行的。

侯斯顿：我们在黄昏、夜幕还未降临的时候潜入水里，这样你便能观察到海洋生物在此时所发生的变化。

大西洋珊瑚礁的傍晚时分是一个繁忙时段。夜间活动的动物渐渐苏醒，而白天活动的鱼类则刚刚吃过晚餐，正要寻找地方栖身过夜。

一场水下灯光表演改变了黑暗的海洋，就像正在上演科幻电影里的一幕

似的。

侯斯顿：珊瑚礁呈现出硫磺色，因为珊瑚虫开始出来捕食流经附近的浮游生物。借助潜水灯，你还可以看到更多色彩。

白天的大部分时间，带刺的龙虾都躲藏在暗礁下，此时也出来散步了。这个地区属于（美国）国家海洋保护区，因此在这里不能捕捞龙虾。

晚上，刺十分警觉，一旦受惊，它便会让自己胀满水，膨胀后比正常状态大了两倍多。它张扬着无数小刺，好让自己在捕食者眼中看起来没有那么美味。

侯斯顿：（潜水时）你就好像进入了失重状态，能够自由翱翔……而你好像正在欣赏一个鱼类万花筒，不过却是处于失重状态，就好像宇航员那样。

一群群小型浮游生物被水下明亮的灯光吸引过来。这些细小的甲壳类动物组成了地球上数量最多的一个群体。一只加勒比暗礁乌贼也被灯光吸引过来了，或许是为了捕食那些浮游生物。

侯斯顿：大多数人似乎认为晚上出去潜水可能是他们有生以来最独特的潜水体验。一开始，他们可能对进行这种尝试感到不大放心，不过，潜入水里四五分钟后，他们就会为身边的美妙情景而深深

着迷。