Fancy Guppy ~ Millionsfish

Family: Poeciliidae Female Fantail GuppyFantail Guppy (female)Poecilia reticulata
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I have three male guppies in my tank and they are lovely beautiful fish. They don't bother any other fish in my tank and can someone tell me why one of my guppies... (more)  Connor

   The various forms of the Guppy, Fancy Guppy, or Millionsfish are the best known and most popular aquarium fish. This species offers a large selection of colors and shapes with no two fish every exactly alike. Guppies are an all time favorite of both beginners and experienced fish keepers!

    The active Guppy, Fancy Guppy, or Millionsfish form loose schools and are always on the move. Though they are peaceful community fish and easily kept with other livebearers, they may chase fry and will often nip the fins of the Betta or Siamese Fighting Fish.

   These fish will appreciate an aquarium with fine gravel that is heavily planted along with some floating ferns. This type of vegetation will provide a bit of food for them as well as hiding places for the fry until they are large enough to not be eaten. Most Guppy, Fancy Guppy, or Millionsfish are very tolerant of a wide variety of tank conditions, though the highly inbred specialized species can be more delicate and require more attention.

   Typical of livebearers, The Guppy, Fancy Guppy, or Millionsfish, appreciates the addition of 1 to 1.25 teaspoons of non-iodized salt added to the aquarium water. They are capable of adapting to brackish or saltwater conditions.


What's in the name?
Poecilia means "many-colored"
reticulata means "netlike"

For more Information on keeping this fish see:
Guide to a Happy, Healthy Freshwater Aquarium

Geographic Distribution
Poecilia reticulata
Data provided by
  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Actinopterygii
  • Order: Cyprinodontiformes
  • Family: Poeciliidae
  • Genus: Poecilia
  • Species: reticulata
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Fancy Guppies - Quick Aquarium Care
  • Minimum Tank Size: 10 gal (38 L)
  • Temperament: Peaceful
  • Aquarium Hardiness: Very Hardy
  • Temperature: 65.0 to 82.0° F (18.3 to 27.8° C)
  • Aquarist Experience Level: Beginner
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Habitat: Distribution / Background

   The Guppy or Millionsfish are native to Central America and Brazil but now are almost exclusively captive bred.

Selectively bred, they come in all colors and combinations of colors:
   There are far too many varieties of Guppy, Fancy Guppy, or Millionsfish to list here, but let it be said that they come in every color of the rainbow, and often have every color of the rainbow in them!
   There are a lot of different shapes to the fins also. Some of the more common fins shapes are: rounded, pintail, swordtail (upper, lower, and double), flagtail, veiltail, fantail, and triangletail.
   There are fancy guppy organizations that breed and show guppies all over the world.

  • Scientific Name: Poecilia reticulata
  • Social Grouping: Pairs - They will not school but can be kept in groups.
  • IUCN Red List: NE - Not Evaluated or not listed

Fish Keeping Difficulty

  • Aquarium Hardiness: Very Hardy - This fish is very widely avaiable, however with great disparity in the quality of stock. The extensive finnage of this species makes it susceptible to damage and resulting infection.
  • Aquarist Experience Level: Beginner

Foods and Feeding

   Since they are omnivorous the Guppy, Fancy Guppy, or Millionsfish will generally eat all kinds of live, fresh, and flake foods. To keep a good balance give them a high quality flake food everyday. Feed brine shrimp (either live or frozen) or blood worms as a treat.

  • Diet Type: Omnivore
  • Flake Food: Yes
  • Tablet Pellet: Yes
  • Live foods (fishes, shrimps, worms): Some of Diet
  • Vegetable Food: Some of Diet
  • Meaty Food: Some of Diet
  • Feeding Frequency: Several feedings per day

Aquarium Care

  • Water Changes: Bi-weekly

Aquarium Setup

  • Minimum Tank Size: 10 gal (38 L)
  • Substrate Type: Any
  • Lighting Needs: Moderate - normal lighting
  • Temperature: 65.0 to 82.0° F (18.3 to 27.8° C)
  • Range ph: 7.0-8.5
  • Hardness Range: 10 - 30 dGH
  • Brackish: No - This is no brackish fish, however it does seem to appreciate this addition of a little salt in the water. Around 1-1.25 teaspons of aquarium salt should suffice. Removed water should be replaced with salted water, however if the aquarist is topping off due to evaporation freshwater should be used.
  • Water Movement: Moderate
  • Water Region: All

Social Behaviors

   The Guppy, Fancy Guppy, or Millionsfish are a good community fish, however they will chase and eat fry, and they are known to nip the fins of the Betta or Siamese Fighting Fish.

  • Temperament: Peaceful - Although not a schooling fish, this fish is happiest in a group of its own kind. It also makes an excellent community fish and mixes well with most fish tolerant of its prefered water conditions. The exception to this is the Beta fish, which will either suffer fin nipping by the guppy or mistake guppies for another Beta and will attack. In either case, this combination does not usually end well.
  • Compatible with:
    • Same species - conspecifics: Yes
    • Peaceful fish (): Safe
    • Semi-Aggressive (): Monitor
    • Shrimps, Crabs, Snails: Safe - not aggressive

Sex: Sexual differences

   The female is larger, more drab in color, and will have a spawning patch at breeding time. The male is smaller, will generally have a longer more colorful tail, and has a gonopodium.

Breeding / Reproduction

   The Guppy, Fancy Guppy, or Millionsfish is easily bred in the aquarium without special attention if well fed and cared for. Provide hiding places or breeding traps for the fry as the parents may chase them. See the description of how to breed livebearers in Breeding Freshwater Fish - Livebearers.

  • Ease of Breeding: Easy


   The Guppy, Fancy Guppy, or Millionsfish is readily available.


Animal-World References

Author: David Brough. CFS.
Lastest Animal Stories on Fancy Guppies

Connor - 2014-11-23
I have three male guppies in my tank and they are lovely beautiful fish. They don't bother any other fish in my tank and can someone tell me why one of my guppies goes to the bottom of the tank every night to sleep and when he wakes up he doesn't look good and then after eats fine and swims perfectly like they should. But they are lovely fish to keep so I recommend you get some.

fish bandit - 2013-11-03
Why isn't there much about endlers on this site? They are colorful live bearers like guppies and mollies... anyway does anyone raise/breed freshwater shrimp? They are great in a tank with some otos, endlers, and some guppies.

  • Clarice Brough - 2013-11-07
    Glad you asked as we have the Endler Guppie in the que for adding. Hopefully we'll get it live soon, so keep an eye out:) I also would like to know of anyone who raises freshwater shrimp, so look forward to some info on that.
Anonymous - 2012-08-14
Can a cross between a guppy (female)and a molly (male) be made as I have a single guppy in my tank I thought to get 2 male mollys as my female guppy is large and allmost size of the molly males

Anonymous - 2013-08-02
This is gonna sound kinda funny but my guppy is fat. It's a male so not prego for sure but I have another and it is waaaay slimmer than this one. They are both the same size in length but the others girth is far larger. And they eat the same amount whenever I am there. This isn't a new occurrence, it has always been like this and it seems healthy but it is almost annoying at this point. Does anyone else have an overweight guppy that can't shed the pounds?