A quintessential community fish known for its durability and massive variety of colors. Native to Central America, Platies are livebearers, meaning they give birth to free-swimming fry. They are peaceful, active grazers that require hard, alkaline water to thrive. They are excellent for beginners but breed prolifically.
At a Glance
Tank Requirements
Water Parameters
Temperament & Compatibility
Available Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Female
The standard female or unsexed juvenile. Females are larger and rounder than males. They are constantly pregnant in the presence of males. To reduce stress, keep 2-3 females for every male.
Differs in 2 traits from base species
Also known as: Mickey Mouse, Wagtail, Sunburst, Tuxedo, Red Platy, Blue Platy, Bumblebee
Male
Smaller and more slender than females, possessing a modified anal fin (gonopodium). Males spend most of their time chasing females. Keeping too many males without enough females leads to stress and aggression.
Differs in 3 traits from base species
Also known as: Male Platy
Balloon Platy
A bred morph with a shortened, globular body and curved spine. They are slower swimmers and prone to digestive issues (constipation) and swim bladder disorders. Avoid high flow.
Differs in 3 traits from base species
Also known as: Potbelly Platy
Platy Care Summary
The Platy, scientifically known as Xiphophorus maculatus, belongs to the Livebearers family group. Adults reach a maximum size of approximately 6 cm and have a compressed body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the mid-level and surface zones of the aquarium and produces a high level of biological waste.
To thrive, the Platy requires a brackish tolerant aquarium with a minimum volume of 38 litres and a tank length of at least 45 cm. Water temperature should be maintained between 20°C and 26°C, with a pH range of 7–8.2 and a general hardness of 10–25 dGH. A moderate water flow is preferred. To replicate their natural habitat, the tank should include plants - densely covered and established algae (otocinclus).
This species should be kept in groups of at least 3 to reduce stress and encourage natural behaviour. This species is available in 3 varieties: Standard / Female, Male, and Balloon Platy. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Similar Species
Guppy
Poecilia reticulata
One of the most iconic and widely kept aquarium fish. Renowned for their incredible colors, hardiness, and prolific breeding. As livebearers, they give birth to fully formed, free-swimming fry. Males constantly pursue females for mating; therefore, a ratio of at least 2 females per male is strongly recommended to disperse stress.
Amazon Puffer
Colomesus asellus
One of the few truly freshwater, community-safe pufferfish. Native to the Amazon basin, these energetic swimmers are known for their bumblebee-like stripes and erratic swimming patterns. Unlike most puffers, they are social and prefer to be kept in groups. CRITICAL WARNING: This species has the fastest-growing teeth of any puffer. They REQUIRE a daily diet of hard-shelled foods (snails, clams, crustaceans) or they will require manual dentistry (trimming) to prevent starvation.
Florida Flagfish
Jordanella floridae
A robust, deep-bodied killifish native to Florida. Unlike most killifish, they are primarily herbivores and are renowned for their ability to eat Hair Algae and sometimes Black Beard Algae. They are sub-tropical and thrive in unheated aquariums. They can be fin-nippers, especially if underfed or kept with long-finned tank mates.
Zebra Danio
Danio rerio
One of the most robust and active aquarium fish available. Native to South Asia, they are a model organism in science due to their genetics. They are extremely active top-level swimmers that must be kept in schools to prevent stress and fin-nipping. They prefer cooler, oxygen-rich water with a current.
Endler's Livebearer
Poecilia wingei
A tiny, vibrant, and highly active livebearer closely related to the Guppy. Males display intense, neon colors and patterns, while females are larger and plainly colored. They are prolific breeders and require hard, alkaline water to thrive.
Red Rainbowfish
Glossolepis incisus
Native to Lake Sentani in Indonesia, this species is famous for the brilliant salmon-red coloration of mature males. They are large, active schooling fish that develop a distinct high-arched back as they age. Females are vastly different in appearance (olive-gold). They require hard, alkaline water and plenty of swimming space.