Shadowing Practice: All About Jellyfish - Learn English Speaking with Video
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Today it's time to learn all about jellyfish.
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Despite their name, it's important to know that jellyfish are not fish at all.
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In fact, to avoid confusion, they are sometimes called sea jellies, or even just jellies.
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Characteristics of Jellyfish Jellyfish are invertebrates, which means they don't have bones.
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They also have no brain, no heart or other organs like lungs or gills.
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Jellyfish obtain the oxygen they need through a process called diffusion, whereby they absorb oxygen directly through their thin body walls from the surrounding water,
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allowing them to survive without specialised respiratory organs.
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Made up mostly of water, jellyfish are characterised by their gelatinous, umbrella -shaped bells and trailing tentacles.
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Jellyfish are free swimming, which means they don't really have a permanent home.
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They often drift with ocean currents, travelling through large stretches of the ocean, seas and bays.
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Jellyfish play an important role in the ocean.
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They function both as predators and prey.
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They feed on small fish, plankton and even other jellyfish, using their tentacles to ensnare and immobilise their prey with toxins.
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At the same time, they are an essential food source for various larger species, such as turtles and certain fishes.
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The main part of a jellyfish is the bell, which looks like an umbrella.
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This bell moves by pulsating, pushing water from underneath to help the jellyfish swim or float.
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The surface of the bell can be smooth or have frilly edges depending on the type of jellyfish,
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and it holds their basic digestive and nervous systems.
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Hanging from the bell are the jellyfish's tentacles, which they use to defend themselves and catch food.
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These tentacles have thousands of tiny stinging cells called nematocysts.
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Each cell has a small dart that can shoot out and deliver venom, which paralyzes or kills small sea creatures.
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Jellyfish can stretch out or pull in their tentacles when they need to.
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Below the bell are the aural arms, which are thicker and look a bit like the tentacles, but have a different job.
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They help move the food caught by the tentacles to the jellyfish's mouth.
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Types of Jellyfish Jellyfish are found in every ocean in the world
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and they come in a variety of shapes sizes and colors.
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Moon jellyfish are one of the most common and recognizable jellyfish species.
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The moon jellyfish is known for its translucent saucer -shaped bell which can be up to 40 centimeters in diameter.
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These jellyfish typically inhabit temperate and tropical oceans around the world and are often seen in large numbers.
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Their The diet mainly consists of plankton and small fish.
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The lion's mane jellyfish holds the title for the largest jellyfish.
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The lion's mane can have a bell diameter of over 2 metres and tentacles that extend up to 30 metres or more.
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It is found in the cold waters of the Arctic, Northern Atlantic and North Pacific Oceans.
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The tentacles are grouped in eight clusters, each cluster containing up to 150 tentacles, lined with nematocysts to capture prey.
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Known for being one of the most venomous marine creatures,
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the box jellyfish has a cube -shaped bell and can grow up to 20 centimetres along each side.
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Its tentacles, which can reach up to three metres in length, are covered with potent venom that can be fatal to humans.
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Box jellyfish are primarily found in the waters of the Pacific and Indian Oceans, particularly around northern Australia and throughout Southeast Asia.
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Cannonball jellyfish are named for their round, cannonball -like shape.
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This jellyfish is common in the coastal waters of the southeastern
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United States and into the Caribbean.
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The bell of the cannonball jellyfish can reach up to 25 centimetres in diameter, and while its sting is not generally harmful to humans,
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it can stun small fish.
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These are just a few examples of the diverse array of jellyfish species found in oceans around the world.
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Jellyfish Life Cycle One super interesting thing about jellyfish is their life cycles, which include several unique stages.
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The jellyfish life cycle starts when a female jellyfish releases eggs into the water, which are fertilised by sperm from a male jellyfish.
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These fertilised eggs turn into tiny, free -swimming larvae called planuli.
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The planuli drift with the ocean currents until they find a good place to settle, like the sea floor or a rock.
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They then attach themselves and become polyps, which look like tiny sea anemones.
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Polyps can stay in this form for a long time, catching and eating small organisms.
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After a while, polyps start to make new jellyfish by forming tiny stacks called aphirae.
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These aphirae eventually break off and become young jellyfish.
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They grow into adult jellyfish which release eggs and sperm into the water starting the cycle again.
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Jellyfish and people.
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Interactions between jellyfish and people cover a wide range of experiences from harmful to beneficial.
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Jellyfish stings are a common concern as their venomous tentacles can cause pain, allergic reactions and, in rare cases, severe health issues.
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Jellyfish are also a source of food for people in several cultures, particularly in Asia, where they are harvested,
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processed and enjoyed for their unique texture and purported health benefits.
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Moreover, jellyfish play a significant role in scientific research.
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Their simple nervous systems and bioluminescent properties have provided valuable insights into cellular processes and neurological functions,
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contributing to advancements in medical and biological sciences.
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Thus, the relationship between jellyfish and humans is a complex interplay of danger, nutrition and scientific discovery.
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Vocabulary and speaking notes for this lesson
This speaking lesson is built on the video “All About Jellyfish”. The speaker keeps coming back to these words: jellyfish, tentacles, bell, ocean, sea. This video has 62 sentences and 907 words to shadow. The speech runs for 7:36. The speaker talks at a steady 119 words per minute, a comfortable pace for shadowing. Only 72% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| egg noun | /ɛɡ/ | An approximately spherical or ellipsoidal body produced by birds, insects, reptiles, and other animals, often housing an embryo within a membrane or shell… |
| swim verb | /swɪm/ | To move through the water, without touching the bottom; to propel oneself in water by natural means. |
| diameter noun | /daɪˈæmɪdɚ/ | Any straight line between two points on the circumference of a circle that passes through the center of the circle; a chord that passes through the center of… |
| prey noun | /pɹeɪ/ | That which is or may be seized by animals to be devoured. |
| sting verb | /ˈstɪŋ/ | To hurt, usually by introducing poison or a sharp point, or both. |
| metre noun | /ˈmiːtəɹ/ | The basic unit of length in the International System of Units (SI: Système International d'Unités), equal to the distance travelled by light in a vacuum in… |
| stretch verb | /stɹɛt͡ʃ/ | To lengthen by pulling. |
| oxygen noun | /ˈɑksɪd͡ʒən/ | The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental… |
| organ noun | /ˈɔːɡən/ | The larger part of an organism, composed of tissues that perform similar functions. |
| cluster noun | /ˈklʌstɚ/ | A bunch or group of several discrete items that are close to each other. |
| harmful adjective | /ˈhɑɹmfl̩/ | Causing or likely to cause harm or damage; injurious. |
| umbrella noun | /ʌmˈbɹɛl.ə/ | A cloth-covered frame used for protection against rain or sun. |
| drift noun | /dɹɪft/ | Anything driven at random. |
| jelly noun | /ˈd͡ʒɛli/ | A dessert made by boiling gelatine (or a plant-based alternative such as agar or carrageenan), sugar and some flavouring (often derived from fruit) and… |
| venom noun | /ˈvɛnəm/ | An animal toxin intended for defensive or offensive use; a biological poison delivered by bite, sting, etc., to protect an animal or to kill its prey. |
Phrasal verbs you will hear
| Word | Pronunciation | Meaning |
|---|---|---|
| break off verb | To remove a piece from a whole by breaking or snapping. | |
| make up verb | /ˌmeɪk ˈʌp/ | To constitute, to compose. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Passive voice be + past participle — the focus is on what happens, not who does it | are sometimes called · are characterised · are found |
| Relative clauses who / which + clause — extra information about a person or thing | invertebrates, which means · swimming, which means · arms, which are |
Pronunciation to watch
- The “th” sounds: thin /ˈθɪn/, thick /θɪk/, smooth /smuːð/, underneath /ˌʌndɚˈniθ/
- The “sh” and “zh” sounds: capture /ˈkæp.(t)ʃɚ/, interaction /ˌɪn.təˈɹæk.ʃən/, confusion /kənˈfjuːʒən/, nutrition /njuːˈtɹɪʃ.ən/, beneficial /ˌbɛn.ɪˈfɪʃ.əl/
- Long words — get the stress right: diameter /daɪˈæmɪdɚ/, primarily /ˈpɹaɪ.mə.ɹə.li/, biological /ˌbaɪ.əˈlɑ.d͡ʒɪ.kəl/, interaction /ˌɪn.təˈɹæk.ʃən/, beneficial /ˌbɛn.ɪˈfɪʃ.əl/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like egg, swim, diameter.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.