Identity and search names
- Common name
- Platy
- Scientific name
- Xiphophorus maculatus
- Other names
- Platy, Southern platyfish, Moonfish, Mickey Mouse platy, High-fin platy, Xiphophorus maculatus
- Category
- Freshwater fish
- Group
- Livebearers
- Origin
- Atlantic-slope waters from Veracruz, Mexico, through northern Central America to Belize
- Review outcome
- PASSED
Environment and housing
- Environment
- Freshwater
- Care level
- Beginner to intermediate
- Adult size
- Males about 4 cm and females about 6 cm total length
- Expected lifespan
- About 2–5 years
- Minimum housing
- At least 75 L for a managed group, with additional capacity for fry
- Temperature
- 22–27 °C
- pH
- 7.0–8.3
- Hardness or minerals
- Moderately hard to hard
- Salinity
- Freshwater
- Lighting
- Moderate with planted refuge
- Social structure
- Keep more females than males or a single-sex group; prevent constant male pressure and plan for rapid population growth
- Placement or swimming zone
- Upper and middle water
- Temperament
- Peaceful to assertive livebearer
- Compatibility
- Use fish that share its harder-water needs; avoid fin nippers, predators and soft-acid-water specialists
- Habitat structure
- Stable mineral-rich aquarium with open swimming room, plant cover, strong filtration and refuge for females
Feeding and nutrition
- Diet
- Algae, plant material, small invertebrates and varied prepared foods
- Feeding frequency
- Feed measured varied meals once or twice daily with regular plant-based content
Breeding and reproduction
- Breeding or reproduction
- Females store sperm and can produce repeated broods of free-swimming fry. Decide capacity, separation and rehoming limits before saving fry.
- Parental care
- No post-birth parental care; adults may eat fry
System demands
- Filtration
- Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
- Aeration
- Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
- Maintenance
- Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.
Detailed husbandry
- Identity scope
- This profile applies to Xiphophorus maculatus and its domestic colour and fin forms. Hybrids with other Xiphophorus must be labelled honestly.
- Adult size and space
- Males about 4 cm and females about 6 cm total length. At least 75 L for a managed group, with additional capacity for fry. Plan around adult dimensions, activity, social structure, aggression and waste production rather than sale size.
- Social structure
- Keep more females than males or a single-sex group; prevent constant male pressure and plan for rapid population growth
- Placement or swimming zone
- Primary zone: Upper and middle water. Keep that zone usable for movement, feeding and refuge.
- Feeding ecology
- Algae, plant material, small invertebrates and varied prepared foods
- Feeding plan
- Feed measured varied meals once or twice daily with regular plant-based content
- Water stability
- Maintain 22–27 °C; pH 7.0–8.3; hardness/minerals: Moderately hard to hard. Stable oxygenation and nitrogen-cycle control matter more than chasing one exact number.
- Adult projected load
- Plan capacity for Keep more females than males or a single-sex group; prevent constant male pressure and plan for rapid population growth at the documented adult size (Males about 4 cm and females about 6 cm total length) in At least 75 L for a managed group, with additional capacity for fry. Include feeding intensity, territorial behaviour and breeding growth rather than counting sale-size juveniles.
- Filtration
- Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
- Aeration
- Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
- Maintenance
- Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.
- Habitat structure
- Stable mineral-rich aquarium with open swimming room, plant cover, strong filtration and refuge for females
- Compatibility plan
- Use fish that share its harder-water needs; avoid fin nippers, predators and soft-acid-water specialists
- Breeding plan
- Females store sperm and can produce repeated broods of free-swimming fry. Decide capacity, separation and rehoming limits before saving fry. Parental care: No post-birth parental care; adults may eat fry.
- Quarantine
- Quarantine new fish in a separate cycled aquarium with dedicated equipment. Match temperature and mineral chemistry gradually, confirm feeding and normal respiration, and never add transport water to the established aquarium.
- Welfare checks
- Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. Platies establish outside their native range and must never be released. Uncontrolled breeding and hybridisation can overwhelm space quickly.
- Biosecurity and release
- Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.
- Main risk
- Platies establish outside their native range and must never be released. Uncontrolled breeding and hybridisation can overwhelm space quickly.
- Overridable warnings
- Platies establish outside their native range and must never be released. Uncontrolled breeding and hybridisation can overwhelm space quickly. Any override must still preserve adult space, social welfare, stable chemistry, oxygen and filter capacity.
Welfare and risk
- Welfare checks
- Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. Platies establish outside their native range and must never be released. Uncontrolled breeding and hybridisation can overwhelm space quickly.
- Main warning
- Platies establish outside their native range and must never be released. Uncontrolled breeding and hybridisation can overwhelm space quickly.
- Biosecurity
- Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.
Sources
Source note
Current identity or scope, husbandry, system-demand, welfare and Australian biosecurity evidence checked; active retired-source links removed; all AquaNexus wording is original.
- Eschmeyer’s Catalog of Fishes — Xiphophorus maculatus — Current accepted-name, synonym, family and habitat check
- Eschmeyer’s Catalog of Fishes — Xiphophorus maculatus — Accepted-name, synonym and taxonomic-placement cross-check
- USFWS ecological risk summary — southern platyfish — Native range, established non-native populations and release-risk cross-check
- IUCN Red List search — Xiphophorus maculatus — Conservation-status and wild-provenance cross-check
- PIRSA — South Australian noxious fish list — Current South Australian possession and trade restriction cross-check
- DAFF — importing live ornamental fish to Australia — Current Australian live-fish import pathway and permitted-species warning