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When we think of sharks, usually we think of predators like great whites.
當我們想到鯊魚時，我們通常會想到像大白鯊這樣的捕食性動物。
Great whites, at 3.7 metres in length, are the most feared animals in the sea,
大白鯊，長3.7米，是海洋中最恐怖的動物，
preying on small whales, seals, other sharks and sometimes even people.
捕食小鯨，海豹，其他鯊魚，有時甚至是人類。
They demonstrate incredible power and speed when hunting.
它們捕食時，表現出難以置信的力量和速度。
However, not all sharks are dangerous.
但是，不是所有的鯊魚都是危險的。
For example, sharks such as the megamouth live off plankton and other small fish,
比如，大嘴鯊這樣的鯊魚以浮游生物和其他小魚為食，
and will never attack humans.
而且永遠不會襲擊人類。
Indeed, there are actually more than 360 species of shark,
事實上，地球上總共有多于360種的鯊魚，
from the whale shark which can reach 14 metres in length,
從可以長達14米的鯨鯊，
to a much smaller shark which measures only 21 centimetres from head to tail.
到從頭至尾只有21厘米的小鯊。
Despite their differences, all sharks do have some things in common.
不管它們的不同之處，所有鯊魚都有一些東西是相同的。
For example, sharks do not have bones,
比如，鯊魚沒有骨頭，
but have flexible cartilage instead which makes them very good swimmers.
但是有柔韌的軟骨，這些軟骨使它們成為出色的游泳者。
Also, unlike most fish, many species of shark hatch their eggs inside their bodies, giving birth to live baby sharks.
同時，不同于大多數魚類，許多品種的鯊魚孵化鯊魚蛋，給小鯊魚生命的過程是在其體內進行的。
While scientists have learnt a lot in recent years,
近些年來，科學家們又獲悉了許多東西，
there are still many things about both sharks and the deep blue sea which we do not understand.
但是仍有許多關于鯊魚，關于深藍大海的諸多東西還是未知的。
Who knows?
誰知道呢？
There may be many other species of marine life even stranger than the megamouth,
也許還存在更多其他的比大嘴鯊還奇特的海洋物種，
still unknown and waiting to be discovered.
至今仍未被知曉并等待著被人發掘。
