Name: 關於鯊魚的兒童視頻：兒童動物視頻 - FreeSchool (All About Sharks for Children: Animal Videos for Kids - FreeSchool)
Uploaded: 2025-05-04T16:20:06.000Z
Duration: 6 min 17 s

Seen by many as cold-blooded killers, sharks have a fearsome reputation.

在許多人眼中，鯊魚是冷血殺手，有著可怕的名聲。

However, there is more to their story than meets the eye.

然而，他們的故事遠不止這些。

Sharks are a special category of fish that live in every ocean in the world, mostly in warm waters.

鯊魚是一種特殊的魚類，生活在世界上的每一片海洋中，大多生活在溫暖的水域中。

有些甚至生活在河流和湖泊中。

Some live near the surface, some live in deep water, and some live on the ocean floor.

有些生活在海面附近，有些生活在深水中，還有些生活在海底。

Some sharks stay near shore or on coral reefs, while others live in the open ocean.

有些鯊魚生活在海岸附近或珊瑚礁上，有些則生活在大洋中。

Unlike fish that have bones, sharks have skeletons made of cartilage.

與魚類的骨骼不同，鯊魚的骨骼是由軟骨構成的。

Cartilage is a tough, flexible material that is not as hard as bone.

軟骨是一種堅韌而有彈性的材料，硬度不如骨骼。

One place you can find cartilage is in your ear.

You can bend and move your ear with your fingers, but it will go back to its normal shape because of the cartilage inside.

您可以用手指彎曲和移動耳朵，但由於耳內軟骨的作用，耳朵會恢復正常形狀。

There are many different species of sharks.

More than 500 species are known, and they vary in size from small sharks not much bigger than a person's hand, to the largest fish in the world, the whale shark, which can grow up to 50 feet or 15 meters long.

目前已知的鯊魚種類超過 500 種，它們的體型大小不一，有比人的手掌大不了多少的小鯊魚，也有世界上最大的魚類--鯨鯊，它可以長到 50 英尺或 15 米長。

Sharks come in many different shapes too, although most sharks have streamlined bodies shaped like torpedoes to help them glide more easily through the water.

鯊魚的形狀也多種多樣，不過大多數鯊魚的身體呈流線型，像魚雷一樣，這樣可以幫助它們更輕鬆地在水中滑行。

Some sharks have flattened bodies that help them to hide in the sand.

有些鯊魚的身體扁平，這有助於它們隱藏在沙子裡。

Some sharks have long noses, or long fins.

And some sharks, called hammerhead sharks, have extremely wide heads.

有些被稱為雙髻鯊的鯊魚，頭部非常寬大。

Most sharks are carnivores, with thousands of sharp teeth.

大多數鯊魚都是肉食動物，擁有數千顆鋒利的牙齒。

In fact, sharks may have up to 3,000 teeth at one time.

事實上，鯊魚可能同時擁有多達 3000 顆牙齒。

When one tooth is lost, it is replaced by another.

當一顆牙齒脫落時，它將被另一顆牙齒取代。

Some sharks may lose as many as 30,000 teeth in their lifetime.

有些鯊魚一生中可能會失去多達 30,000 顆牙齒。

Most sharks have about five rows of teeth at a time, but the teeth in the front are the biggest and do most of the work.

大多數鯊魚一次大約有五排牙齒，但前面的牙齒是最大的，可以完成大部分工作。

A few sharks, like the basking shark, are filter feeders instead.

少數鯊魚，比如姥鯊，是濾食性鯊魚。

They swim with their mouths wide open, and strain tiny plants and animals from the water.

它們張大嘴巴游動，從水裡撈起小植物和小動物。

It takes huge quantities of plankton and small fish to feed these huge sharks.

需要大量的浮游生物和小魚來餵養這些巨大的鯊魚。

Sharks are fish, and fish do not sleep the way that we do, but they do have active and resting periods.

鯊魚是魚類，魚類不像我們那樣睡覺，但它們確實有活動期和休息期。

Some sharks are able to rest motionless on the seafloor, but other sharks have to keep moving in order to breathe.

有些鯊魚可以在海底一動不動地休息，但有些鯊魚必須不停地移動才能呼吸。

Let's learn about some special species of sharks.

讓我們來了解一些特殊的鯊魚種類。

The great white shark is the largest predatory fish in the world.

大白鯊是世界上最大的食肉魚類。

They regularly reach sizes of 21 feet or 6.4 meters in length, although some sharks measuring over 26 feet or 8 meters have been reported.

它們的體長通常達到 21 英尺或 6.4 米，但也有報道稱一些鯊魚的體長超過 26 英尺或 8 米。

They can be found in oceans all over the world, as long as the waters are not too cold.

只要海水不是太冷，它們就能在世界各地的海洋中找到。

Many people are afraid of great whites, and it is true that they are responsible for more shark attacks on humans than any other shark in the world, but they would rather not eat humans, much preferring prey like tuna, dolphins, whales, and seals.

很多人都害怕大白鯊，的確，大白鯊襲擊人類的次數比世界上任何其他鯊魚都要多，但它們寧可不吃人，也更喜歡金槍魚、海豚、鯨魚和海豹等獵物。

The whale shark is the largest fish in the world, but it is a filter feeder instead of a predator.

鯨鯊是世界上最大的魚類，但它是濾食性魚類，而不是捕食性魚類。

It eats mainly plankton, krill, and small crustaceans, but it will also eat small fish that get sucked into its mouth.

它主要吃浮游生物、磷蝦和小型甲殼類動物，但也吃被吸進嘴裡的小魚。

Whale sharks live in warm, tropical waters, and are easily recognized by their spotted skins.

鯨鯊生活在溫暖的熱帶水域中，其斑紋狀的皮膚很容易辨認。

Hammerhead sharks are a group of shark species that are recognized by the strange shape of their heads.

錘頭鯊是一組鯊魚物種，它們因頭部形狀奇特而被人們所認識。

They use the wide hammer on the front of their heads to help them catch their favorite food, stingrays, by trapping them against the seafloor.

它們利用頭部前端的寬錘幫助捕捉最喜歡的食物--黃貂魚，把它們困在海底。

Most species of hammerhead are small, but the great hammerhead can reach lengths of up to 20 feet or over 6 meters.

大多數種類的雙髻鯊體型較小，但大雙髻鯊的體長可達 20 英尺或 6 米以上。

Many people are afraid of sharks, and think that sharks will attack any time they see you.

很多人都害怕鯊魚，認為鯊魚一看到你就會發動攻擊。

For the most part, however, sharks do not attack humans.

不過，在大多數情況下，鯊魚不會攻擊人類。

Out of hundreds of different species there are, only four shark species have been involved in a significant number of attacks.

在數以百計的鯊魚種類中，只有四種鯊魚涉及大量襲擊事件。

Fewer than 5 people a year are killed by sharks in the whole world.

全世界每年只有不到 5 人被鯊魚殺死。

In fact, many more sharks are killed by humans.

事實上，更多的鯊魚是被人類殺死的。

It is estimated that about 100 million sharks are killed by people every year due to fishing.

據估計，每年約有 1 億條鯊魚因捕魚而喪生。

Because of this, many shark species are in danger of extinction.

正因為如此，許多鯊魚物種瀕臨滅絕。

They play a very special role in ocean ecosystems, keeping fish populations from growing too large, and helping the entire food chain remain healthy.

它們在海洋生態系統中發揮著非常特殊的作用，使魚類種群不至於過於龐大，並幫助整個食物鏈保持健康。

Without sharks, the entire ocean would suffer.

沒有鯊魚，整個海洋都會遭殃。

I hope you enjoyed learning about sharks today.

希望你們喜歡今天的鯊魚知識學習。