The Surprising Truth About the Plural of Tuna
Quick Answer
The plural of tuna is tuna. The word does not change. One tuna, ten tuna — always the same.
One: I caught a tuna this morning.
Many: We caught five tuna this morning.
One Tuna, Two Tuna — See the Pattern
Look at these words. Can you see what happens?
- one tuna → two tuna
- one salmon → two salmon
- one sheep → two sheep
- one deer → two deer
Did you see the pattern? Some English words stay exactly the same for one or for many. Tuna is one of these words. You do not add -s or anything else.
| One (singular) | More than one (plural) |
|---|---|
| one tuna | five tuna |
| one salmon | ten salmon |
| one sheep | twenty sheep |
| one deer | three deer |
Why Tuna Does Not Change
Most English words add -s for more than one. For example: one cat → two cats. But tuna is different. It comes from a group of words — mostly animals and fish — that keep the same form for one and for many.
How do you know if someone means one tuna or many? You look at the words around it:
Words that show ONE tuna:
- a tuna → I saw a tuna in the water.
- one tuna → She bought one tuna at the market.
- this tuna → This tuna is very big.
Words that show MANY tuna:
- many tuna → There are many tuna in the ocean.
- several tuna → We caught several tuna today.
- ten tuna → The fishermen brought back ten tuna.
Easy way to remember: If you see a, one, or this, it is one tuna. If you see a number, many, or several, it is more than one.
The Rule in One Line: Tuna never changes — one tuna, many tuna. The words around it tell you how many.
How to Use Tuna in Everyday English
- I had a tuna sandwich for lunch today. (the food — no need for a number)
- We saw three tuna jumping out of the water. (many tuna — a number tells you)
- This can of tuna is on sale at the shop. (the food — one can)
- The fishermen catch tuna every morning near the coast. (many tuna — it is their job)
- A tuna can swim very fast — up to 75 kilometres per hour! (one tuna — talking about the animal)
You are doing great. Now let’s look at the mistakes many learners make with this word.
The Most Common Mistake With Tuna
Even advanced learners add -s to tuna sometimes — so if you make this mistake, you are not alone. Your brain wants to follow the normal rule and say “tunas.” But tuna is a special word.
Mistake 1: Adding -s for many
✗ We caught five tunas yesterday.
✓ We caught five tuna yesterday.
Mistake 2: Saying “a tunas”
✗ I want to eat a tunas sandwich.
✓ I want to eat a tuna sandwich.
Mistake 3: Using the wrong verb
✗ The tuna is swimming in the ocean. (talking about many)
✓ The tuna are swimming in the ocean. (talking about many)
How to remember: Think of tuna like water. You do not say “two waters.” You just say “water.” Tuna works the same way — the word itself never changes.
Other words like this: salmon → salmon, sheep → sheep, deer → deer, shrimp → shrimp.
Test Yourself: Tuna or Tunas?
Choose the correct answer for each sentence. Click Check to see if you are right.
1. We saw ten _______ swimming near the boat.
2. I had a _______ sandwich for lunch.
3. The fishermen caught three _______ this morning.
4. There _______ many tuna in the Pacific Ocean.
5. How many _______ did they find in the net?
Keep Going — You Are Building Something
You just learned that tuna never changes — one tuna, many tuna, always the same. That is one more word you will never get wrong again.
But here is something interesting. The word salmon works the same way — one salmon, many salmon. But what about shrimp? Is it “one shrimp, two shrimp” or “one shrimp, two shrimps“? The answer is not as simple as you think.
Next lesson: Plural of Salmon Explained: What You Need to Know
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My name is Khamis Maiouf. I am the creator of the English Teacher Site, dedicated to providing valuable resources and insights for students around the world. With a passion for education and a commitment to helping students enhance their skills, I aim to make English teaching more effective and enjoyable for both educators and students.
