Guppy
Poecilia reticulata
Quick answer
The guppy is a tiny, brightly colored freshwater fish native to northeastern South America and the Caribbean and one of the most popular aquarium fish in the world. Males are small and colorful with flowing tails, while females are larger and plainer. Guppies are livebearers that breed easily and quickly, and they typically live about 2 to 3 years.
Guppy facts at a glance
| Scientific name | Poecilia reticulata |
|---|---|
| Diet | Omnivore |
| Habitat | Warm fresh and brackish waters |
| Lifespan | 2–3 years |
| Length | 3–6 cm (1–2.4 in); females larger |
| Top speed | Quick, darting swimmer |
| Conservation status | Least Concern (IUCN) |
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Actinopterygii |
| Order | Cyprinodontiformes |
| Family | Poeciliidae |
| Genus | Poecilia |
Where it lives
Fresh and brackish waters of northeastern South America and nearby Caribbean islands; introduced widely elsewhere.
Behavior and appearance
Guppies are active, peaceful fish that do well in groups and spend their time swimming in the upper and middle levels of the water. Males are smaller and famously colorful, with patterned bodies and large, ornate tails used to attract females, while females are larger and more plainly colored. Selective breeding has produced an enormous range of colors and fin shapes in the aquarium trade.
Diet and feeding
Guppies are omnivores that eat algae, tiny invertebrates, insect larvae, and detritus in the wild. In aquariums they readily accept flake food, small pellets, and live or frozen foods such as brine shrimp. Their small size means they need only small, frequent meals.
Habitat and range
Guppies are native to fresh and brackish waters of northeastern South America, including Venezuela, Guyana, and Trinidad and Tobago, and nearby Caribbean islands. They have been introduced around the world, partly to control mosquito larvae, and now live in many warm regions. They tolerate a wide range of conditions, which helps them spread.
Breeding and care
Guppies are livebearers, meaning females give birth to free-swimming young rather than laying eggs, and they can produce broods every few weeks. This rapid breeding makes them very easy to raise but can quickly overpopulate a tank. They are hardy and tolerant, which is why they are often recommended for beginning aquarists.
Frequently asked questions about the Guppy
Are guppies good for beginners?
Yes. Guppies are hardy, peaceful, and inexpensive, tolerate a range of water conditions, and breed easily, making them one of the most popular fish for new aquarists.
What do guppies eat?
Guppies are omnivores that eat algae, small invertebrates, and insect larvae in the wild. In aquariums they happily take flakes, small pellets, and live or frozen foods.
How do guppies reproduce?
Guppies are livebearers, so females give birth to free-swimming young instead of laying eggs. They can produce a new brood every few weeks, multiplying quickly.
How long do guppies live?
Guppies typically live about 2 to 3 years. Good water quality, a balanced diet, and a low-stress tank help them reach the upper end of that range.
Why are male guppies more colorful than females?
Males use their bright colors and ornate tails to attract females, so coloration is shaped by mate choice. Females are larger and plainer, which helps them stay less conspicuous.
How big do guppies get?
Guppies are small fish. Males reach about 3 cm (1.2 in) and females about 6 cm (2.4 in), with the females growing noticeably larger.
