1. Goldfish Can't Close Their Eyes - This makes sleeping a littel different for them. Instead of closing their eyes and falling into a deep sleep, they sleep with their eyes open usually at the bottom of the water.

2. Goldfish Have Been Pets for 1000+ Years - Dating all the way back to ancient China, goldfish have been common household pets.

3. World's Oldest Goldfish - The world's oldest recorded goldfish was 43 years old. Which is just amazing for almost any pet really, and he did very well considering he was won at a town fair. His name was Tish, and he died in 1999 in North Yorkshire, UK.

4. Goldfish Don't Have Stomachs - I don't know how interesting people will find this one, but I thought I'd throw it out there.

5. Through A Goldfish's Eyes - Through a goldfish's eyes you would see a lot more color. Goldfish are able to see ultra-violet and infra-red light. This also mean they have a greater spectrum of visual colors.

6. Their Size Depends On Their Space - If you give a 2 inch goldfish a 55 gallon tank, they're going to make good use of the extra space. Of course, giving a single goldfish 55 gallons may be a little over the top. But if this were the case, they would grow to occupy more space then if they were kept in a 10 gallon tank. Sorry kids, but a goldfish in a  55 gallon tank won't grow to be 4 feet and 200 pounds.

Note: Per request of some readers I'd like to mention that this does in fact stunt their growth, they will thrive if given ample space.

7. Number 2 Only - Not just goldfish, but no fish urinates. But as any goldfish owner will tell you, they compensate with poop.

8. Goldfish Can Live In Cold and Freezing Waters - I wouldn't say they like it, but if a goldfish is left in an outdoor pond through the Winter, they'll likely be swimming around again by Spring. When it gets really cold or freezing, a goldfish's body will slow down dramatically, almost like hibernating. As the waters warm up they spring back to life.

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