Guppies are a common aquarium breed, but also an invasive species on many continents. Learn how to care for guppies and the damage they can do in the wild. Skip to main content .

Guppies have been a separate species for 500,000 years, and during that time their color has changed drastically. But one thing has stayed the same: an orange patch on males.

Grigorev Mikhail /Shutterstock 4. They're Easy to Breed . Guppies don't have terribly long lifespans, but that doesn't mean you have to keep running down to the pet store to keep restocking your tank.

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Some guppies live in havens that are largely predator-free except for the killifish, ... 4th of July Sale - 25% OFF! Magazine for all ages starting at $25/year. SEE SUBSCRIPTION OPTIONS.