Common Name(s)
Guppy, millions fish
Scientific Name
Poecilia reticulata
Family
Poeciliidae
Origin
Venezuela, Suriname, Guyana, French Guiana, Brazil, Trinidad and Tobago, Barbados, Antigua and Barbuda, Jamaica, U.S. Virgin Islands, and the Netherlands Antilles
Temperament
Peaceful
Maximum Size
2.5 inches
Minimum Tank Size
10 gallons for males, 20 gallons for females.
Tank Setup
Any, but they like planted tanks. Doesn’t like strong water currents. Doesn’t do well in acidic water.
Tank Region
Middle-top
Diet
Wild are insectivorous, but aquarium-bred types will accept almost any foods offered.
Breeding
Extremely easy. Soon you’ll want them to stop…...
Compatibility
With other peaceful non-fin-nipping fish.
Ease of Keeping
Beginner
Care
pH: 7-8.5. Temperature: 62-82 Fahrenheit. Hardness: 90-536 ppm.
One of the best beginners fish. Very easy to breed, but likes hard water. Don’t keep with fin nippers. They like to nibble on algae.

Males have gonopodiums. Females are larger, plumper, and generally not as colorful.
guppy.jpg

By Marrabbio2 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1785530