11 Goldfish Fun Facts [Infographic]

Estimated read time 3 min read

Goldfish are awesome pets, they are brightly coloured and have lots of character. Here are 11 fun facts about goldfish shown in a great infographic from The Aquarium Guide.


Further Reading: Interested in keeping Goldfish learn everything you need in our Goldfish Care section.

Fun Facts About Goldfish
Courtesy of: The Aquarium Guide

Here Are 11 Goldfish Interesting Facts

To recap here are the 11 facts shown in the infograph above along with a great video with a few more fun facts about Goldfish.

1) How Long Can Goldfish Live Without Food?

A goldfish can last for more than 2 weeks without food!

Although this is an amazing trait, I would never recommend doing this to any fish. If you think you will be away for a few weeks it’s best to arrange for someone to come and care for your fish.

2) Goldfish Like To Give

In some Asian countries, it was popular to give a goldfish as a gift of friendship. If you did this today just be sure your gift comes along with an aquarium and some equipment.

3) How Big Do Goldfish Get?

Goldfish can grow as big as a fully grown cat. There are some reports online of Goldfish weighing as much as 5lbs.

So you might not want to keep them in small tanks. Our post on how many goldfish in a 10-gallon tank will give you some good things to think about before you try to fit a goldfish in a tiny tank.

4) Do Goldfish Squeak?

When Goldfish eat they can make squeaking and grunting noises through their noses.

5) How Many Types Of Goldfish Are There?

There are over 300 different types of Goldfish. Here are some of the most popular;

  • Fantail Goldfish
  • Veiltail Goldfish
  • Telescope Goldfish
  • Black Moor Goldfish
  • Oranda Goldfish
  • Celestial Goldfish
  • Bubble Eye Goldfish
  • Ryukin Goldfish

6) Do Goldfish Change Color?

Yes, goldfish can change color as they grow old but did you know that during breeding some males will develop “Stars” to impress the females.

7) Do Goldfish Close Their Eyes When They Sleep?

Goldfish can’t close their eyes, so when they sleep, their eyes remain open.

8) Do Goldfish See Color?

Goldfish can actually see 4 colors, while humans only see 3 colors. Goldfish can see red, green and blue along with ultraviolet light, giving them a polarized vision.

9) Do Goldfish Have Stomachs?

Goldfish don’t have a stomach. Instead, they have a long intestinal track that does the same thing. If you have ever kept Goldfish, this explains a lot.

10) Do Goldfish Have Teeth?

Okay, maybe they won’t bite you but, Goldfish do have teeth in the back of their throats.

11) Can Goldfish Smell?

Goldfish have a very stong sense of smell. This helps them find food easily as well as avoid danger.


Recap: 5 Simple Sentences About Goldfish

  1. Goldfish can make squeaking and grunting noises through their noses.
  2. Goldfish have teeth but won’t bite you
  3. Goldfish have a very strong sense of smell
  4. Goldfish can see up to 4 colours but sleep with their eyes open
  5. There are over 300 different types of Goldfish.

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