Hifin Neon Black Platy (Xiphophorus variatus)

The Hifin Neon Black Platy (Xiphophorus variatus) takes a tough, easygoing livebearer and dresses it up for the evening. The body is dark, the scales carry a metallic "neon" sheen that flashes blue and green as the fish turns under the light, and the dorsal fin stands up tall like a small sail. It is a striking contrast fish in a bright planted tank, and it keeps all the qualities that make platies great for beginners: hardy, peaceful, and always out in the open. Browse the rest of our live fish and freshwater supplies to build its community.

A Variatus Platy

Two platy species are common in the hobby. The everyday platy is Xiphophorus maculatus. This line is sold by our supplier as the Variatus Platy, Xiphophorus variatus, a slightly slimmer, slightly larger cousin from eastern Mexico that tends to handle cooler water especially well. Decades of selective breeding have crossed the two species many times, so most fancy platies carry some genes from both, and care is the same either way.

Color develops with age. Young fish may look more charcoal than jet black, and the neon sheen and hifin dorsal get more dramatic as they mature, especially in males.

Care Guide

• Tank size: 10 gallons for a small trio, 20 gallons or more for a group or community. Variatus platies are active, and livebearer groups grow quickly.
• Water parameters: 68 to 78°F, pH 7.0 to 8.2, moderately hard to hard water. Soft, acidic water is the most common reason platies fade and fail. Seachem Equilibrium helps if your tap water is soft.
• Stocking ratio: two or three females for every male, or an all male group, so no single female is chased all day.
• Feeding: omnivore that needs plant matter. A spirulina flake such as Xtreme Spirulina Flakes once or twice a day, with Hikari Micro Pellets and frozen brine shrimp for variety. Good food brings out the best sheen.
• Dark background, bright light: black fish show best against green plants and light sand. A dark tank with a dark substrate hides them.
• Maintenance: change about 25% weekly. Clean water keeps the tall dorsal fin free of fraying and fin rot.

Specifications

Compatibility

This platy fits almost any peaceful community that runs hard, neutral to alkaline water. Good company includes other livebearers like the Green Lantern Platy, Blue Wag Platy, and Pineapple Swordtail, along with Zebra Danios, Cherry Barbs, corys, and nerite snails. Its cool water tolerance also makes it a good match for unheated room temperature setups that stay above about 68°F.

What goes wrong: fin nippers that shred the tall dorsal, large cichlids that bully or eat platies, and soft water specialists like discus that want very different conditions. Adult tank mates will eat fry, so add heavy plant cover if you want babies to survive.

Recommended Foods & Supplies

• Xtreme Spirulina Flakes as the daily staple
• Hikari Micro Pellets for variety and growth
• Hikari Bio-Pure Frozen Brine Shrimp as a treat
• Seachem Equilibrium to harden soft water
• Guppy Grass for fry cover and bright green contrast
• Fluval Hang-On Breeding Box to raise fry

FAQ

What makes it a "hifin"?
A selectively bred trait that gives the fish a much taller, longer dorsal fin than a standard platy. It is most dramatic on mature males.

Is it a different fish from a regular platy?
Technically it is sold as the Variatus Platy, Xiphophorus variatus, rather than the common X. maculatus. Aquarium lines of the two have been crossed for generations, so they behave, breed, and are cared for the same way.

Will it breed with my other platies?
Yes. Platies of both species and swordtails all interbreed freely, so mixed tanks produce mixed looking babies.

Why does mine look gray instead of black?
Young fish, stress, and bare tanks all mute the color. Give it a week or two to settle, feed well, and keep plants around it, and the black and the neon sheen usually deepen.

Does it need a heater?
Not always. Variatus platies handle cooler water better than most tropicals and do fine from 68 to 78°F. If your room drops below that, add a heater.