Xiphophorus maculatus
Hardier and longer-lived than guppies, same hard-alkaline water, more colour variants (red wagtail, mickey-mouse, sunset, calico). 3:1 female:male ratio prevents male harassment. Bred so heavily commercially that beautiful colours sometimes hide a fragile constitution; buy from a local breeder where you can.
Southern Platy (Xiphophorus maculatus) reaches 4–6 cm as an adult and needs a minimum tank of 60 L. Native to Mexico and Central America, it lives in the mid to top water column with a peaceful temperament. Aim for 20–26 °C, pH 7.0–8.2, and 10–25 dGH hardness. Lifespan is 3–5 years with good care. Keep southern platy in groups of 4+, no (live in groups) schoolers need numbers to display natural behaviour. Diet: omnivore, Crushed flake, micro pellets, blanched veg (spinach, courgette). Eats 1–2x daily. Plant-safe: Yes. Shrimp-safe: Yes (with adults; may eat shrimplets).
Care at a glance
Hardier and longer-lived than guppies, same hard-alkaline water, more colour variants (red wagtail, mickey-mouse, sunset, calico). 3:1 female:male ratio prevents male harassment. Bred so heavily commercially that beautiful colours sometimes hide a fragile constitution; buy from a local breeder where you can.
By Mike ElmiraUpdated 1 min read
Part of our complete guide to aquarium fish for the planted tank.
The parameters that decide whether southern platy fits in your tank.
Mid to Top
No
Small group of 4+
Poeciliidae
Omnivore
Crushed flake, micro pellets, blanched veg (spinach, courgette). Eats 1–2x daily.
3–5 yrs
Very Easy
Slow weedy springs and pools of southern Mexico
Mexico and Central America
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Direct answers to the questions search engines and AI assistants surface most often about this species.
Southern Platy (Xiphophorus maculatus) needs a minimum tank of 60 L. They live in the mid to top water column and should be kept in groups of 4+, so a longer footprint matters more than depth.
Target 20–26 °C, pH 7.0–8.2, and 10–25 dGH hardness. Acclimate slowly when moving them between water sources.
Shrimp safety: Yes (with adults; may eat shrimplets). Plant safety: Yes.
Southern Platy are omnivore. Crushed flake, micro pellets, blanched veg (spinach, courgette). Eats 1–2x daily.
On Fin & Stem's 1–5 difficulty scale this species rates 1/5. Almost unkillable, a solid first-tank choice. Breeding difficulty: very easy.
Typical lifespan in a well-maintained tank is 3–5 years.
A planted tank is a system. Pair this fish with one entry from each other pillar to plan the whole scape.
