16個關於鯊魚的冷門知識，看完讓我突然好想要擁抱鯊魚呢…

1. 鯊魚會透過感應心跳來追蹤獵物！   他們鼻子上有電流偵測機制可以偵測到獵物的心跳心電脈搏！   2. 鯊魚殺人比例男女有別啊！   儘管在海中游泳的男女生比例幾近相同，近9成的鯊魚攻擊案例中，受害者都是男性！ 廣告1   3. 但也不需太害怕啦，被鯊魚追殺的可能性老實

July 10, 2015
選擇語言：
編輯：Anne
世界, 動物

1. 鯊魚會透過感應心跳來追蹤獵物！

Sharks track their prey with their heartbeats. They can pick up on electrical pulses associated with a heartbeat via electricity-sensing nodules on their nose.
 
他們鼻子上有電流偵測機制可以偵測到獵物的心跳心電脈搏！

 

2. 鯊魚殺人比例男女有別啊！

Despite the fact that an almost equal amount of men and women swim in the ocean, men account for nearly 90 percent of shark attack victims.
 
儘管在海中游泳的男女生比例幾近相同，近9成的鯊魚攻擊案例中，受害者都是男性！
廣告1

 

3. 但也不需太害怕啦，被鯊魚追殺的可能性老實說也很低！

It is more likely that you are bitten by another person than a shark. You're even less likely to die from an attack. On average, there are 40 shark attacks reported each year, with only 5-10 of them being fatal.
 
基本上，被一個人咬的可能性比被鯊魚咬的比例還要高！縱看攻擊案例中死亡的機率更是低啊！平均來說，每年都有40起鯊魚攻擊通報案例，但其中只有5-10起才是真正有致命性的！

 

4. 雙髻鯊其實頭部很軟！

Hammerhead sharks are born with soft heads so they won’t jam their mothers’ birth canals.
 
這樣才不會在生產時卡到，讓媽媽難產啊！
廣告2

 

5. 原來我們都小看鯊魚的厲害了！

Sharks inhabited the earth 200 million years before the dinosaurs appeared and have changed only minimally during that time.
 
鯊魚在恐龍出現2億年前就已經在地球上生存了，而從那時開始的演化程度並不大。
廣告3

 

6. 這不就是《侏羅紀世界》的現實版？！

An ancient shark called Carcharodon Megalodon (“rough tooth, big tooth”) had teeth measuring more than six inches long (the largest shark teeth ever found), jaws big enough to swallow an entire car, and a body the same length as tyrannosaurus rex. Some believe this shark may still exist in the very deepest of waters.
 
一種叫做Carcharodon Megalodon (學名意思是「粗糙的牙、巨大的牙」) 的古代鯊魚有比6吋長的牙齒 (目前找到最大的鯊魚牙齒) ，嘴巴大到可以把整台車吞下去，而身長跟暴龍一樣呢！有些人甚至懷疑在海底深處還是找得到這個物種！

 

7. 鯊魚外形設計其實跟飛機很像！

Much like airplanes move through the air, sharks glide through the water. A shark’s tail forces water to flow over its fins much like a propeller creates airflow over the wings of a plane. Their infamous dorsal fins are used for added stability.
 
就跟飛機在空中滑翔，鯊魚也是這樣在水中移動。他們的尾巴設計則會強迫水流像螺旋槳幫助氣流以流線型的方式滑過機翼！他們的背鰭則是專門增加穩定性用的！

 

8. 記錄上最長的鯨鯊竟比4層樓高度加總還要長！

The largest known whale shark was longer than a four-story house. It was just over 40 feet long and weighed over 47,000 pounds.
 
他的長度超過40呎 (約12公尺) 一點點，重量則超過47,000磅 (約21,318.8公斤) ！

 

9. 鯊魚好柔軟喔！

Sharks do not have a single bone in their bodies. Their skeletons are made entirely of cartilage.
 
鯊魚其實體內沒有任何一根硬硬的骨頭，他們的骨架全是軟骨啊！

 

10. 歐氏尖吻鮫(Goblin Shark) 真的很神秘！

Goblin shark dens are so deep, that humans can't explore them.
 
歐氏尖吻鮫的洞穴深到人類無法探索的地步！

 

11. 鯊魚並不是孤獨的獵人！ 

Sharks have some of the largest fish brains. While we tend to think sharks are lone hunters and prowl by themselves, they are actually very social creatures, with established hierarchies.
 
鯊魚的腦袋是魚類之中排名前幾大的！雖然我們總以為鯊魚很孤僻，喜歡自己打獵覓食，但事實上他們可是很常社交的，在群體內也有非常明確的階級制度！

 

12. 鯊魚很常掉牙齒！

The average shark has 40-45 teeth and can have up to seven rows of replacement teeth. Because sharks lose a lot of teeth and grow them back quickly, they often go through more than 30,000 teeth in a lifetime.
 
鯊魚平均來說有40-45顆牙齒，替換的牙齒則有時可多達7排呢！由於鯊魚很常掉牙、長回來的速度也很快，因此他們一生中通常可以換上多於3萬顆牙！

 

13. 鯊魚真的不喜歡吃人！

If you are unlucky enough to be bit by a shark, the shark will not likely come back for a second taste when she or he realizes that you are not, in fact, a marine mammal.
 
如果你真不幸被鯊魚咬到，鯊魚不太會回來咬下第二口，因為他們發現你不是海生的哺乳類動物時，就失去興趣了！

 

14. 鯊魚不動的話，並不會溺水！

Contrary to popular belief, sharks don't drown if they stop moving. Using the muscles around their mouths, ancient sharks could pump water over their gills so that oxygen could be absorbed. Present-day sharks often breathe differently instead by using fast swimming motions to force water over their gills.
 
這是大眾的錯誤迷信！其實從古代開始，鯊魚就會利用嘴巴附近的肌肉，把水推過魚鰓，氧氣就能被身體吸收。現今的鯊魚則多利用快速游動速度強迫水流過他們的鰓。

 

15. 鯊魚不會蛀牙！

Sharks don't get cavities. There are several species who have teeth that are coated in fluoride, thus keeping their pearly whites strong.
 
世上有許多物種的牙齒都會有天生的氟覆蓋著，讓他們永保珍珠般亮白堅強的牙齒！
廣告4

 

16. 鯊魚其實很虛弱！

Sharks are vulnerable creatures. Between 20-30% of shark species are believed to be close to extinction, in large part due to being hooked on accident by commercial fisheries.</p><br /><br /><br /><br /> <p>Source
 
有20-30%的鯊魚物種據信快要滅絕了，而大多都是因為被漁夫們誤釣上船！

來源：BusinessInsider | TheChive

看完這些鯊魚相關的冷門知識，再來看看這20種可怕的海底畫面吧！

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分類：世界, 動物
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