Poeciliidae

Red Platy

Xiphophorus maculatus

A form of:Common Platy

This ornamental variety of the common Platy (Xiphophorus maculatus) is known by the English trade name Red Platy Fish, and in America, the synonym Coral Platy is also encountered.

Tank
from 60 L (16 gal)
Temperature
20 – 28 °C (68 – 82 °F)
Size in aquarium
5 – 7 cm (2 – 2.8 in)
Acidity
pH 7–8.2
Natural rangeRange on the map
  • Belize
  • Fiji
  • Guatemala
  • Honduras
  • Mexico
  • Nicaragua

Tank conditions

Plan the tank stocking
Temperature
20 – 28 °C (68 – 82 °F)
Water pH
Neutral (7) – Slightly alkaline (8.2)
Water dH
Medium hardness (10) – Very hard (30)
Water salinity
no salt (freshwater)
Size in aquarium
5 – 7 cm (2 – 2.8 in)
Lifespan
4 years
Temperament
Peaceful (regular)
Toward small fish
not a predator
Required aquarium volume
from 60 L (16 gal)
Lighting
dimmed
Substrate
any (no restrictions)
Water flow
weak or moderate
Swimming level
near the surface
Feeding
Any (universal)
Keeping
Mixed solitary / pair / group
Jumping
noticeable a lid is needed
  • Lifespan. A lifespan to expect under good care, not a measured value: it depends heavily on tank volume, water quality and diet — and for selectively bred forms, on their origin as well.
  • Toward small fish. Based on the Predators category in the catalog or the temperament in the species parameters. “A risk to small fish” means the species is not a predator by habit, yet will swallow any fish that fits in its mouth.
  • Required aquarium volume. This is a husbandry recommendation, not a measured value: the volume depends on the keeping mode (mixed (solitary / pair / group)), footprint, decor and tank mates.

Care and keeping

Description

The Red Platy is a selectively bred form, distinguished by its rich, solid body coloration. The fish have a dense, moderately elongated body, compressed laterally. Adult males reach 3.5–4 cm, while females are larger, up to 6–7 cm. Through selective breeding, varieties with different fin shapes have been developed, including veil-tailed and pointed-tailed options. Sexual dimorphism is evident in size and the structure of the anal fin: in males, it is transformed into a copulatory organ – the gonopodium.

Habitat

In the wild, Xiphophorus maculatus inhabits water bodies in Central America, from Mexico to Guatemala. The fish prefer areas with slow currents, dense aquatic vegetation, and silty or sandy bottoms. The natural habitat is characterized by stable water parameters; however, due to high adaptability, the species successfully tolerates a wide range of conditions in aquarium culture.

Behavior and Compatibility

These are peaceful and active fish, suitable for keeping in community tanks with similarly sized tankmates. Intraspecific behavior is hierarchical: males can be persistent towards females, so it is recommended to keep them in groups with a predominance of females in a ratio of 1:2 or 1:3. The species coexists well with other livebearers and non-aggressive fish.

Care and Maintenance

For keeping 3–4 fish, an aquarium of 60–70 liters is considered optimal. It is important to provide a sufficient number of shelters in the aquascape. These can be lush thickets of aquatic plants, as well as driftwood or other natural and artificial decorative elements. To maintain comfortable conditions, warm, slightly alkaline water with medium to high hardness (GH) is necessary. It should be noted that the Red Platy tolerates soft water poorly. As for feeding, any common foods can form the basis of their daily diet, be it dry, frozen, or live. In addition, a number of manufacturers offer specialized foods developed specifically for Platies. In terms of behavior, the Red Platy is a peaceful and friendly fish. It coexists perfectly with many freshwater species of similar size. The fish reach sexual maturity at 3–4 months. Females give birth every 4–6 weeks, producing 20 to 40 fully formed fry. However, their parental instincts are not developed, so to prevent the young from being eaten, it is necessary to timely transfer the fry to a separate aquarium.

Diet

Platies are omnivores. Their diet should include both high-quality dry foods and live or frozen products such as bloodworms, daphnia, or brine shrimp. An important feature is the need for vegetable supplementation, so it is recommended to offer them specialized foods containing algae or finely chopped vegetables. Regular feeding with diverse components helps maintain vibrant coloration.

Breeding and Reproduction

The species is a livebearer, and breeding occurs easily in a community tank without special stimulation. Fertilization is internal, after which the female carries the fry for up to 4 weeks. Before giving birth, the female's abdomen becomes rounded, and a dark spot appears near the anal fin. To ensure the survival of the offspring, dense plant thickets or a breeding box are recommended, as adult fish may eat the fry.

Diseases

Platies have a strong immune system but are sensitive to water quality and keeping conditions. A common problem is melanosis — a pathology associated with excessive melanin production, manifesting as dark spots on the body. Prevention includes maintaining cleanliness, regular water changes, and eliminating stress factors that can weaken the body's protective functions.

How to choose

When choosing, pay attention to the fish's activity, the cleanliness of its skin, and the absence of unnatural spots or fin damage. A healthy specimen should have a robust body without signs of emaciation or spinal curvature. It is recommended to avoid purchasing fish from tanks where signs of disease are observed in other inhabitants, and to quarantine new fish before introducing them into the main tank.

Compatibility

There are no pair reviews for this species yet — check tankmates in the matcher.

All tankmates

Plants and this fish

Matching water does not mean the plant will stay intact.

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Red Platy get?

An adult reaches 5–7 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Red Platy need?

The recommended volume is 60 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Red Platy need?

Temperature 20–28 °C, pH 7–8.2, hardness 10–30 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Red Platy live?

Around 4 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Red Platy aggressive?

Temperament: peaceful (regular). Keep this in mind when choosing tank mates.

How many Red Platy should be kept together?

Recommended setup: mixed (solitary / pair / group). Ignoring this is a common cause of stress and disease.

What does Red Platy eat?

Diet type: any (universal). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Red Platy?

The scientific name of the species is Xiphophorus maculatus, family Poeciliidae. It also appears in the literature as: Platypoecilus aurata, Platypoecilus cyanellus, Platypoecilus maculatus.

Similar fishes

Matched by family, categories and overlapping keeping conditions

Balloon Platy

Balloon Platy

Xiphophorus maculatus

Poeciliidae

The Balloon Platy, also called disk platy, is known in the trade as Balloon Platy. Its distinctive feature is an unusual body shape: a strongly curved, humped back and a noticeably swollen belly, present in both males…

Black Platy

Black Platy

Xiphophorus maculatus

Poeciliidae

In the trade, this cultivar is sold as Platy Black. It does not occur in nature but is an artificially developed colour variety of the common platy (Xiphophorus maculatus). Despite its name, the black colour, though…

Blue Platy

Blue Platy

Xiphophorus maculatus

Poeciliidae

The blue platy is a selectively bred form of Xiphophorus maculatus that does not occur in nature. It is sold under trade names such as Platy Blue, Blue Moon Platy, and Platy Neon Blue. Its defining feature is the blue…

Common Platy

Common Platy

Xiphophorus maculatus

Poeciliidae

The common platy (Xiphophorus maculatus) belongs to the family Poeciliidae. Its hardiness and bright colours make it one of the most popular aquarium fish. Most platys in tanks are selectively bred varieties, some of…

Other scientific names and conservation status

Other scientific names
Platypoecilus aurata, Platypoecilus cyanellus, Platypoecilus maculatus, Platypoecilus nigra, Platypoecilus pulchra, Platypoecilus rubra
Conservation status
Data deficientDD