We saw such a great response to our top 10 goldfish facts that we’ve decided to give you 10 more amazing facts about goldfish!
Goldfish facts 11-20
Goldfish Fact #11: Goldfish don’t urinate!
No fish urinate. Instead of expelling ammonia by urinating (as mammals do), fish filter ammonia from the water using their gills.
Goldfish Fact #12: Goldfish can live in very cold water!
The metabolism of a goldfish will slow down significantly in cold water, almost like they are hibernating. This means that goldfish can survive in very low temperatures, sometimes even in ponds that have frozen over for the winter! Read more…
Goldfish Fact #13: Goldfish and koi are NOT the same species
Goldfish and koi are both members of the carp family, but they are not the same species. They can interbreed but their offspring will be sterile. Read more…
Goldfish Fact #14: Goldfish lay lots of eggs!
A female goldfish will lay hundreds or even thousands of eggs in a single spawning. However, only a small proportion of these will be fertilised. Read more…
Goldfish Fact #15: Goldfish change colour depending on light levels.
If your goldfish is kept in the dark at night, you may notice that its color appears faded when you switch the aquarium light on again in the morning. Also, goldfish kept outdoors with greater exposure to natural light are usually more colorful than goldfish that are kept indoors. Read more…
Goldfish Fact #16: Goldfish are omnivores
Goldfish Fact #17: Goldfish have been available in Europe and the US for a long time!
The domestic goldfish originated in China, but was introduced to Japan in 1603, to Europe in 1611 and to North America around 1850. Read more…
Goldfish Fact #18: Goldfish were once traditional anniversary gifts!
In the early 17th century it was traditional for men to give their wives a goldfish on their one-year anniversary! This was meant to symbolise a prosperous future, but the tradition died out when goldfish became more readily available.
Goldfish Fact #19: Touching a goldfish can endanger its health!
You should never pet your fish, as you may damage the slime coat that protects its skin from infection.
Goldfish Fact #20: Goldfish get used to being around humans
Goldfish can get used to humans and will eventually stop considering them a threat. This can make it possible to feed your goldfish by hand!