Guppy
Poecilia reticulata
Guppies exhibit vibrant coloration and distinctive patterns, with males showcasing brighter hues and larger fins than females.
This page includes AI-generated images. Why am I seeing AI images?
About the Guppy
The Guppy is one of the most popular freshwater fish among aquarium enthusiasts due to its colorful appearance and lively nature. These fish have a wide range of vibrant colors and tail shapes, making them a visual delight in any aquarium. Guppies are known for their peaceful temperament and ease of care, making them ideal for both beginner and experienced fishkeepers.
Also known as
Quick Facts
Size
2.5 inches
Temperament
Peaceful
Difficulty
Beginner
Min Tank Size
5 gallons
Lifespan
2-3 years
Origin
South America and the Caribbean/West Indies
Diet
Omnivore - flakes, pellets, frozen foods
Water Parameters
23-27°C
7-8
6-18 dGH
Need a heater for this species?
This species needs 23-27°C in a 5 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Guppies do well in a planted aquarium with gentle flow; a larger tank is helpful for groups and breeding control. Maintain stable tropical temperatures around 23-27°C (74-80°F).
- Maintain clean water by performing regular water changes of 20-30% weekly and ensuring ammonia, nitrite levels are at 0 ppm, with nitrate levels ideally below 20 ppm.
- Feed guppies a varied diet of high-quality flake food supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health and vibrant coloration.
- Guppies are peaceful community fish and can coexist with other non-aggressive species like tetras, mollies, and platies but avoid housing them with fin-nippers like barbs.
- Known for being prolific breeders, guppies can give birth to live fry approximately every 30 days; providing ample hiding spaces and using a breeder box can help increase fry survival rates.
- Monitor guppies for common health issues such as fin rot and swim bladder problems, and maintain ideal water conditions and a balanced diet to prevent stress-related illnesses.
- Guppies generally do best in slightly alkaline, harder water; a commonly cited pH range is about 7.0-8.0, with moderate hardness (e.g., ~6-18 dH).
Compatibility
Good Tankmates
- Other peaceful community fish
- Small tetras and rasboras
- Corydoras catfish
- Cherry shrimp and other small invertebrates (may eat shrimplets/fry)
- Harlequin rasboras
Avoid
- Aggressive cichlids
- Large predatory fish like Oscars
- Fin-nipping species such as tiger barbs
- Betta fish, due to potential aggression
Habitat and Natural Environment
Guppies (Poecilia reticulata) are native to northeastern South America, including countries like Brazil, Venezuela, and Guyana. They are widely distributed in freshwater environments such as rivers, streams, and ponds. Guppies have also been introduced to many countries around the world due to their popularity in the aquarium trade and use for mosquito control.
Guppies are highly adaptable and can be found in various water conditions, although they prefer warmer, slightly alkaline waters.
Tank Setup Requirements
Setting up a guppy tank is relatively easy, making them perfect for beginners. A minimum tank size of 10 gallons is recommended for small groups, but more space is always beneficial.
- Temperature: 72-82°F (22-28°C)
- pH: 6.8-7.8
- Hardness: 8-12 dGH
- Filter and heater to maintain water quality and temperature
- Plants and decorations to mimic natural habitat and provide hiding spaces
Regular water changes and maintenance of water parameters are important to ensure a healthy environment for your guppies.
Feeding and Diet
Guppies are omnivorous and have a varied diet in the wild that includes algae, small insects, and plant material. In captivity, they thrive on a balanced diet of high-quality flake food, supplemented with live or frozen foods.
- High-quality flakes or pellets designed for tropical fish
- Live or frozen brine shrimp, daphnia, or bloodworms as treats
- Occasional vegetable matter like blanched spinach or spirulina flakes
Feeding small amounts multiple times a day is preferable over a single large feeding to maintain water quality and fish health.
Behavior and Temperament
Guppies are known for their lively and peaceful nature. They are active swimmers and tend to occupy all areas of the tank, making them an entertaining species to observe.
Guppies are social fish and should be kept in groups of at least five to ensure their well-being and reduce stress.
Breeding
Guppies are prolific breeders and one of the easiest fish species to breed in home aquariums. They are livebearers, meaning they give birth to free-swimming fry rather than laying eggs.
- Maintain a ratio of one male to two or three females to reduce stress in females.
- Provide plenty of hiding spaces for females to retreat during mating.
- Use breeding boxes or separate pregnant females to increase fry survival rates.
Guppy fry can be fed crushed flakes or specially formulated fry food to ensure proper growth.
Health and Common Issues
Guppies are generally hardy fish, but can still be susceptible to common aquarium diseases. Maintaining water quality and a balanced diet will greatly reduce the risk of illness.
- Common issues include ich, fin rot, and fungal infections.
- Regular observation of fish behavior and appearance is key for early detection of health problems.
- Quarantine new fish before adding them to the main tank to prevent disease introduction.
Overcrowding and poor water conditions can lead to stress, making guppies more susceptible to disease.
Similar Species
Other freshwater peaceful species you might be interested in.
Ajuricaba tetra
Jupiaba ajuricaba
Jupiaba ajuricaba is a South American freshwater characin from the Amazon basin in Brazil (rio Negro, rio Solimões, and rio Tapajós basins). It reaches about 9.5 cm SL and is diagnosed by a narrow dark midlateral stripe, an elongated humeral spot, and an ocellated spot on the upper caudal-fin lobe. Wild specimens have been collected from blackwater forest streams and also oxbow-lake habitats.
Amapa tetra
Hyphessobrycon amapaensis
This is a tiny, super sleek little tetra with a clean red stripe down the side that really pops once its settled in. It does best in a planted, slightly tinted "creek-style" setup and looks way cooler when you keep a proper group so they school and flash that line together. If you can give it soft, slightly acidic water and a calm community, its an easy fish to fall for.
Anteridorsal Homatula loach
Homatula anteridorsalis
This is a benthic Chinese stream loach from Yunnan that lives right down on the bottom in clear, flowing water over gravel and rocks. Think of it as a "river tank" fish - it wants current, oxygen, and lots of surfaces to poke around on for bits of food and algae.
Armoured stickleback
Indostomus paradoxus
This is that goofy little "freshwater seahorse"-looking fish that just kind of perches and scoots around like a tiny armored twig. Its whole vibe is slow, sneaky micropredator - once its settled in, you will catch it stalking microfoods and doing these subtle little posture displays. The big trick is feeding: they do best when you can provide lots of small live foods in a calm, planted tank.
Arnegard's electric fish
Petrocephalus arnegardi
This is a little Congo River elephantfish (a weakly electric mormyrid) that cruises the lower parts of the tank and navigates the world with its electric sense. It stays small (around 9 cm) and has a clean silvery look with three dark marks that make it pretty easy to pick out among Petrocephalus.
Aroa twig catfish
Farlowella martini
Farlowella martini is one of those unreal-looking stick catfish that just vanishes the moment it parks itself on a branch. It is a super calm, slow-moving grazer that does best in a mature tank with lots of biofilm, gentle flow, and clean, oxygen-rich water - they are not great at competing at feeding time, so you kind of have to look out for them.
More to Explore
Discover more freshwater species.
American flagfish
Jordanella floridae
Jordanella floridae is that little Florida native with the red-and-cream striping that really does look like a tiny flag once a male colors up. They graze algae like champs (especially stringy/hair algae), but they have a bit of attitude - give them plants and space so the bossy behavior stays manageable. Bonus: the male guards the eggs and will actively fan them, which is pretty fun to watch.
Amur sculpin
Alpinocottus szanaga
This is a little coldwater sculpin from the Amur drainage - a bottom-hugging, rock-and-gravel fish that spends its day wedged under stones and darting out to grab food. Super cool behavior and attitude, but it is absolutely not a warm tropical community fish - it wants chilly, fast, oxygen-rich water and will bicker with other bottom fish.
Anitápolis livebearer
Jenynsia weitzmani
Jenynsia weitzmani is a freshwater anablepid livebearer endemic to southern Brazil (currently known only from the type locality near Anitápolis, Santa Catarina). Like other Jenynsia (onesided livebearers), reproduction involves lateralized mating morphology/behavior; aquarium care guidance is not well-documented for this species specifically.
Aracu-comum
Schizodon vittatus
Schizodon vittatus is a large South American anostomid (family Anostomidae). Reported maximum size is about 35 cm standard length; it is harvested/consumed in parts of Brazil and is not commonly covered by mainstream aquarium husbandry references.
Arraya's bluntnose knifefish
Brachyhypopomus arrayae
This is a weakly-electric South American knifefish that cruises around plants and root mats and does most of its business after lights-out. It is a pretty subtle-looking fish (more earthy browns than flashy colors), but the cool part is the whole electric-sense lifestyle and that smooth, hovering knifefish swim.
Arrowhead puffer
Pao suvattii
Pao suvattii is that sneaky Mekong puffer that likes to sit low and ambush food, and it has that super recognizable arrow/V pattern on its back. Gorgeous fish with tons of personality, but it is absolutely not a community guy - plan on a solo, species-only setup if you want everybody to stay in one piece.
Looking for other species?