15 Amazing Fun Facts About Goldfish You Probably Didn’t Know

Goldfish is one of the most popular aquarium fish. They are usually kept as a pet in indoor aquariums. In some countries, it became a tradition for married men to give their wives a goldfish on their first wedding anniversary, as a symbol for the many prosperous and flourishing years to come. Here are 15 fun and interesting facts about goldfish that will blow your mind.  

1. Goldfish Can Grow Over A Foot Long

Goldfish can actually grow very big and very quickly if proper nutrients and food are given and the right care is taken. In fact, they can grow over a foot long.

2. Goldfish Should Never Be Kept In Unfiltered Small Fish Tanks

If goldfish are kept in unfiltered small fish tanks and aquariums, they will never grow larger than 6 inches due to bad water quality.  It is very harmful to them and should never be done.

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3. Goldfish Can Live Up To 30 Years

Goldfish have an average lifespan of approximately 10-15 years. However, some species of goldfish can live up to 30 years if proper care is taken.

4. World’s Longest Goldfish Was 47.4 cm Long

According to Guinness World Records, the world’s longest goldfish was owned by Joris Gijsbers. It was 47.4 cm (18.7 inches) long and was confirmed on March 24, 2003, in Hapert, The Netherlands.

5. Goldfish Can Survive Without Food For A couple of weeks

Goldfish can easily survive without food for a couple of weeks in the pond.

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facts of goldfish

6. Single-tailed Goldfish Can Live Up To 20 Years

Single-tailed goldfish can easily survive approximately 10 to 15 years in a large aquarium. However, they can live up to 20 years in a pond under the right conditions.

7. Goldfish Are The Most Common Household Pet

Goldfish are one of the most popular fish to keep as pets in fish bowls, aquariums, or small ponds. In the United States, goldfish are actually the most common household pet.

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facts of goldfish

8. Oldest Living Goldfish Lived For 43 Years 

In the Guinness Book of Records, the oldest living goldfish lived for 43 years.

9. Goldfish Will Lose Their Color If They Are Kept In A Dark Room

Goldfish will gradually lose their color and eventually turn white if they are kept in a dark room or in a dark region and not exposed to any sunlight.

10. There Are 300 Different Types Of Goldfish

There are more than 300 different types of goldfish around the world.

11. Goldfish Don’t Have Teeth In Their Mouths

Goldfish actually don’t have teeth in their mouths. They have teeth right at the back of their throats.

12. Pet Goldfish Can Recognize The Human

Scientists have found that pet goldfish can distinguish between humans and can recognize the human that regularly feeds them.

13. Goldfish Have A Great Sense Of Smell

One of the cool fun facts about Goldfish is that Goldfish have an impressively developed sense of smell which is even stronger than the ability of humans.

facts of goldfish

14. Goldfish Don’t Have Stomach

Goldfish don’t have a stomach which means that food can’t be stored for a long time or in large amounts. However, goldfish digest food and extract nutrients as the food pass through their intestines.

15. Goldfish Cannot Close Their Eyes

At night, goldfish do go to sleep but with their eyes open as goldfish do not have eyelids and cannot close their eyes.

These are 15 fun facts about goldfish.

FAQ: 15 Fun And Interesting Facts About Goldfish

As goldfish are one of the most common household pets, a lot of questions about goldfish come to our minds. Here I have answered some of the most frequently asked questions about it. 

Q1. Can Goldfish Really Get Big?

Ans: If proper nutrients and food are given, goldfish can actually grow very big and very quickly. They can grow over a foot long if the right care is taken.

Q2. How Old Do Goldfish Live?

Ans: Goldfish have an average lifespan of about 10-15 years. However, if proper care is taken, some species of goldfish can live up to 30 years.

Q3. Do Goldfish Recognize Humans?

Ans: According to scientists, pet goldfish can distinguish between humans and can also recognize the human that regularly feeds them.

Q4. What Is The Length Of The Longest Goldfish?

Ans: According to Guinness World Records, the longest goldfish in the world was owned by Joris Gijsbers, which was 47.4 cm (18.7 inches) long. It was confirmed in Hapert, The Netherlands on March 24, 2003.

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Sayan Banerjee
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