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Platy fish - Xiphophorus maculatus

Platy fish - Xiphophorus maculatus

Scientific name: Xiphophorus maculatus

Common name: Platy fish

Family: Poeciliidae

Usual size in fish tanks: 5 - 8 cm (1.97 - 3.15 inch)


Recommended pH range for the species: 7 - 8.3

Recommended water hardness (dGH): 12 - 18°N (214.29 - 321.43ppm)

0°C 32°F30°C 86°F

Recommended temperature: 20 - 26 °C (68 - 78.8°F)

The way how these fish reproduce: Pseudo-Livebearer

Where the species comes from: Central America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Middle levels


Platy will eat almost anything that fits into its mouth. Give them high quality flakes, granules and from time to time frozen or live food like daphnia, bloodworms or brine shrimp to achieve the best health and brightest colouration.


Their natural habitat is from southern Mexico to Honduras. They live there in creeks, springs, canals, ditches and swamps, however nowadays they are to be found in some US states too, even Hawaii.


The difference between a male and a female is very obvious. The male is much smaller and slimmer with a pointed anal fin called gonopodium, while the female’s anal fin is rounder. They also reach their sexual maturity very early, when they are about 4 months old.


Platy fish is a pseudo-livebearer witch means the female does not lay eggs, but her eggs are fertilized and hatch inside of her. Then when the little ones are ready, she gives birth to fully developed small fish. For this to happen you simply have to put at least one male and one female into a tank and wait. That is all. One female can give birth to about 60 little fish every 5 weeks which is often the cause of overpopulation. The fry can be fed by crushed flakes, the smallest granules, small brine shrimps or special fry food.


They can live from 6 months to 3 years. It all depends not just on the conditions you have in your tank, but also on the source of your fish. Since they are very popular in the aquarium trade, they are often inbred which is the cause of poor health of many specimens.

Tank requirements

Platies are very hardy but even so, never put them into a tank with soft water and low pH. Also pay a lot of attention to the filtration system as decaying biological material lovers the pH and don’t use driftwood as a decoration. Tiny amount of aquarium salt will do them good too. The minimum size of a tank should be 60 litres or 16 gallons for 5 or 6 fish. They will love a tank with a healthy growth of plant, among which they will feel secure and protected.


Any non-aggressive fish will fit, just avoid the big-mouthed ones. Also platies may annoy some of their tankmates, especially those with long fins. Never forget to keep them in shoals. Since males often harass their females, keep two females per every male to minimize the stress males will cause to females by their over-eagerness. Plants will also be a great help, because females will have more places to hide from males.

Short description

Xiphophorus maculatus comes in various forms. There are almost thousands of various colours you can get them in and by breeding forms, you always can get some new ones. Most common are red, black, blue, white, yellow, orange, pink, any shades of these colours, or mixes and there also are some long finned platies too. But the wild form itself is very rare. Since their genetic system is very well studied, they are used for research in various scientific disciplines.


Thanks a lot to halkor for pictures. Other were bought from

Platy fish Platy fish Platy fish Platy fish Platy fish picture 5 Platy fish picture 6 Platy fish picture 7 Platy fish picture 8 Platy fish picture 9 Platy fish picture 10 Platy fish picture 11 Platy fish picture 12 Platy fish picture 13

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