A Different Kettle of Fish Idiom: Meaning, Origin, Usage & Exercises

Idioms like ‘a different kettle of fish' are the secret sauce to boosting your IELTS band score, especially in IELTS Speaking Part 3 and Writing Task 2, where you need to compare ideas, explore alternatives, or analyse contrasts. Unlike overused phrases like ‘on the other hand’, this idiom allows you to introduce subtle differences between topics, issues, or people with native-like flair. 

In this blog, we will explore the meaning, origin, and usage of the idiom ‘a different kettle of fish’, and provide examples for IELTS Speaking and Writing.

There is an additional treat for you! In the video below, learn some useful idioms for IELTS Speaking that will help you maintain the formal tone while impressing your examiner.

A Different Kettle of Fish Idiom: Meaning

‘A different kettle of fish’ refers to something completely different in nature from what has just been mentioned, often unexpected, contrasting, or challenging in another way. It can be used positively or negatively depending on context and often appears in both formal discussions and casual conversations.

The idiom ‘a different kettle of fish’ is typically used in a neutral to informal tone. While it is perfectly suitable for casual conversations, it can also be used in semi-formal contexts, such as the speaking exam or personal anecdotes in IELTS Writing Task 2, provided the rest of the tone matches.

Origin of A Different Kettle of Fish Idiom

Although originated in the United Kingdom, this phrase is also prevalently used in the United States. There are multiple variations of the origin story, which are given as follows:

• The origin can be traced to 1785 when A Tour in England and Scotland by Thomas Newte was published. 
• Another origin of the phrase dates back to 1889 when it was mentioned in Carlisle Patriot, a newspaper published in Scotland. The newspaper had mentioned this phrase as, “To enable them to manage their own local affairs will not satisfy Irishmen. What they want is a very different kettle of fish.” In 1738, this idiom also appeared in The Rival Masons, which was taken from The Political State of Great Britain’s 56th volume. However, in this book, the word ‘different’ was replaced with ‘fine.’ 
• Another mention was found in The History of Tom Jones, published by Henry Fielding in 1749.

Later, it evolved into ‘a different kettle of fish’, emphasizing that the second situation is entirely distinct, often more complicated, unusual, or unrelated. Today, it’s a common idiom in British English, with growing recognition in academic and international English contexts like the IELTS.

A Different Kettle of Fish Idiom Usage

Whether discussing education systems, technological advances, or job preferences, a different kettle of fish adds idiomatic richness and variety to your response. 

So, listed below, are a few examples of natural and context-rich sentences that demonstrate the use of the idiom 'a different kettle of fish' in a wide range of contexts:

• The current prime minister is a different kettle of fish from his predecessors.
• Out of my sister and I, she is a different kettle of fish.
• I cannot figure out the taste of this dish as it is a different kettle of fish from what I have tasted so far.
• What you said yesterday is completely different from today’s opinions. It’s like a different kettle of fish altogether.
• Working remotely is one thing, but managing a global team across time zones is a completely different kettle of fish.
• I enjoy fiction writing, but screenwriting is a whole different kettle of fish.

A Different Kettle of Fish Idiom: Synonyms and Related Phrases

Here are some useful idioms for IELTS Speaking to score band 8.0+, expressions related to the idiom ‘a different kettle of fish’.

A Different Kettle of Fish Idiom: Detailed Usage in IELTS Contexts

With sample answers tailored to common topics, we can now take the time to explore how this idiom can be applied effectively across IELTS contexts.

IELTS Speaking Part 2

• Topic: Describe an Unusual Experience You Had in Your Life.
• Answer Excerpt: “I used to volunteer in my city, but doing the same work in a remote Himalayan village was a completely different kettle of fish. The challenges, language barriers, and logistics made it much more demanding.”

IELTS Speaking Part 3

• Question: Do you think learning online is the same as learning in a classroom?
• Answer: “Not at all. Online learning offers flexibility, but it lacks face-to-face interaction. It's a completely different kettle of fish, especially for students who struggle with self-discipline.”

IELTS Writing Task 2

• Topic: Some believe homeschooling is better than formal education. Discuss both views.
• Answer Excerpt: While homeschooling allows for a personalised pace and structure, institutional learning fosters socialisation and structure. These approaches are not interchangeable; they are two different kettles of fish, each with unique benefits and drawbacks.

A Different Kettle of Fish Idiom: Practice Exercise

The following exercises will guide you on how to properly use the idiom 'a different kettle of fish' and show you how to apply it appropriately.

1 Which scenario best suits the use of ‘a different kettle of fish’?

A Buying apples from a grocery store.

B Switching from working in finance to teaching in rural schools.

C Drinking tea at your usual café.

D Wearing a different coloured shirt.

2 Which of the following idioms does not convey the idea of difference or contrast?

A Apples and oranges

B A different kettle of fish

C In the same boat

D Worlds apart

3 In which situation would someone most likely say something is ‘a different kettle of fish’?

A When discussing two jobs that require very different skills

B When talking about fish they’ve caught

C When comparing two identical books

D When explaining how to make tea

4 What is the meaning of this sentence: “Living alone is a different kettle of fish from living with roommates.”?

A Living alone is more relaxing than living with others.

B Living alone and living with roommates are two completely different experiences.

C Both situations are identical in terms of responsibility.

D Living with roommates involves cooking more fish.

5 Choose the sentence where ‘a different kettle of fish’ is used incorrectly.

A Switching from driving a car to flying a plane is a different kettle of fish.

B Managing a team remotely is a different kettle of fish compared to in-person leadership.

C Teaching adults is a different kettle of fish from teaching children.

D I asked for salmon, but this is a different kettle of fish.

A Different Kettle of Fish Idiom: Answer Keys for Practice Exercise

1 B

2 C

3 A

4 B

5 D

In conclusion, mastering idioms like ‘a different kettle of fish’ gives you the upper edge in IELTS. It allows you to express comparisons with precision, sound more fluent and natural, impress the examiner with less common phrases, and add variety to essays and spoken answers. So, use the idiom, a different kettle of fish, and similar other best phrases to use in IELTS Speaking to achieve your desired score. 

Useful Links:

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• In the Prime of Life - Idiom of the Day for IELTS
• IELTS Speaking Lessons: Improve Fluency, Vocabulary & Band Score
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• 10 Useful IELTS Speaking Tips to Impress the Examiner