Balloon Platy

Poecilia sphenops

Photo of aquarium fish Balloon Platy
LivebearersConservation status: Least concern LC

Family:Poeciliidae

Other scientific names: Gambusia modesta, Gambusia plumbea, Lembesseia parvianalis, Mollienesia altissima, Mollienesia macrura, Mollienesia pallida

The Balloon Platy, also known as the Disc Platy, is known in the English-speaking commercial world as the Balloon Platy. A distinctive feature of this fish is its peculiar appearance: it has a strongly arched, hunched back and a noticeably inflated belly, characteristic of both males and females. Variations in coloration and body pattern can be very diverse.

Required aquarium volume
60 L
Size in aquarium
5 – 7 cm
Temperature
20 – 28 °C
Temperament
Peaceful (regular)
Parameters
Temperature20 – 28 °C
Water pHNeutral (7) – Slightly alkaline (8.2)
Water dHMedium hardness (10) – Very hard (25)
Water salinityincreased (10–15 g/L)
Size in aquarium5 – 7 cm
Lifespan4 years
TemperamentPeaceful (regular)
Toward small fishnot a predator
Required aquarium volume60 L
Lightingweak (low)
Substrateany (no restrictions)
Water flowweak or moderate
FeedingFloating (protein)
CareMixed (solitary / pair / group)

Frequently asked questions

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

How big does Balloon 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 Balloon Platy need?

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

What water parameters does Balloon Platy need?

Temperature 20–28 °C, pH 7–8.2, hardness 10–25 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Balloon Platy live?

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

Is Balloon Platy aggressive?

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

How many Balloon Platy should be kept together?

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

What does Balloon Platy eat?

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

What is the scientific name of Balloon Platy?

The scientific name of the species is Poecilia sphenops, family Poeciliidae. It also appears in the literature as: Gambusia modesta, Gambusia plumbea, Lembesseia parvianalis.

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