Looking for a colorful schooling fish for your freshwater aquarium, but feel standard old neon tetras are a little overdone? Don't worry: you've got plenty more original options to choose from. One of our favorite underrated gems is the green fire tetra, whose dramatic colors and energetic swimming style will make you want to stare at your tank for hours. And they're easy to care for, too!
Find out how to successfully keep this South American beauty in your aquarium below.
"Green fire" sums up this active little schooling tetra pretty well! The metallic green they're named for features across the torpedo-shaped body, shimmering as the fish moves, while the red "fire" is concentrated in the anal fin and tail area. Males also sport striking dots of white on their fin lobes. The females have more muted colors, but are still very nice to look at.
Green fire tetras reach up to 2" in length. They're highly active and inhabit the middle to upper water layers, constantly interacting with their shoal mates and — in the males' case — sparring and showing their flashy fins off to the ladies. With good care, your green fires can live for up to five years.
Green fire tetras hail from the heart of South America. They can be found in the Río Paraguay, Río Paraná, and Río Madeira basins that run through western Brazil (including the famous Pantanal wetlands), Paraguay, Bolivia, and northern Argentina and Uruguay. You won't come across them in the main rivers, though; they stick to calmer waters like floodplains, streams, and smaller tributaries.
These habitats are usually shaded by marginal vegetation and abundant floating plants, and can also feature dense aquatic greenery and tree litter. All this cover is perfect to help little fish like the green fire tetra avoid larger predators, which is probably why they're so abundant here in the first place!
Because green fire tetras like to be surrounded by their own kind and are always moving around, they do best in aquariums of 20 gallons and up. A long tank is preferable to a tall one: these tetras barely use vertical space, but love being able to get their daily horizontal laps in.
Videos of green fire tetras in the wild, like one by Tai Strietman , almost always show them completely surrounded by plants and sticks. They'll appreciate something similar in your aquarium. No need to plant it so densely you can't see your fish anymore, of course, but plenty of cover around the edges (with ample swimming space in the middle) will really help them feel comfortable. You can add rocks, driftwood, and some leaf litter to finish the scape.
Green fire tetras aren't particular about the type of substrate used, but we think a dark shade really helps show off their colors and imitate their natural habitat. They're not used to being blasted with light, so consider keeping the brightness relatively low or growing floating plants to create shaded spots.
These tetras are considered hardy, flexible, and resistant to the occasional beginner mistake. They don't like very hard or alkaline water, but will do fine in a wide range of parameters as long as the tank is fully cycled and stable.
Temperature: 68–82°F
We've got a nipper, everyone! Green fire tetras don't make good tankmates for long-finned or slow-moving species like labyrinth fish. The long feelers and extravagant fins of gouramis and bettas , for example, are like red cloth to a tiny underwater bull. That doesn't mean these tetras don't make good community fish, though. Many other small, peaceful species will do just fine alongside a school of green fires.
Your best bet is to opt for quick and/or robust tankmates like:
If you'd like to go for a biotope set-up for your green fires, you're in luck. The waters these tetras naturally inhabit are full of other fish present in the aquarium hobby, so sourcing tankmates they might have come across in the wild should be a breeze.
You can try, among other species:
And lastly, don't forget that schooling fish like these feel uncomfortable when they're not surrounded by their own kind. They rely on safety in numbers, so it's a good idea to get at least six (ideally 8+) green fire tetras. They'll act bolder and show themselves more, plus seeing the boys show off and squabble over the females is always fun to watch.
Because green fire tetras are somewhat nippy, we wouldn't rank them as the #1 best shrimp tankmates . That doesn't mean this pairing can't work, though: most aquarists manage to keep the two together just fine in larger, densely planted systems. The trick is to choose a shrimp species that's either relatively large (like Amano shrimp or ghost shrimp ) or breeds so quickly the colony can stand to lose a few babies occasionally (like cherry shrimp ).
Your green fire tetra starter pack:
Thanks to their omnivorous nature, green fire tetras are far from picky and will accept any kind of small formulated tropical fish food. You can try high-quality flakes, micropellets and tablets; they'll eat whatever the rest of the tank is having.
As with almost all aquarium fish, be sure to also include frozen and even live foods from time to time. Seeing your tetras go nuts over a serving of live Daphnia isn't just fun, but it also supports their health — and can even help get them in the mood for breeding.
Like most small schooling fish, green fire tetras are pretty laissez-faire when it comes to reproduction. Most of the group will spawn at once, scattering sticky eggs over fine-leaved plants or other textured surfaces. After this, the tetras have nothing more to do with the offspring — except to eat them if they happen to be hungry.
In densely planted tanks, a group of healthy green fires will usually slowly expand without any intervention on your part. Because these fish tend to eat their own young, though, your best bet to maximize survival is to set up a separate breeding tank. The parents can spawn in there, then move back to the display aquarium so you can raise the babies yourself.
→ Learn all about breeding egg-scattering fish
Because green fire tetras never really made it to mainstream aquarium popularity — we have no idea why — they aren't available at every fish store. If yours doesn't have them in stock, the staff might be willing to order a batch in for you if you ask nicely.
Can't find these fish locally or just don't feel like leaving the comfort of your home? You can also buy online. We're pleased to offer you our healthy, high-quality green fire tetras here at The Shrimp Farm, shipped right to your doorstep with live arrival guarantee!
Hablützel, P. I. (2012). A preliminary survey of the fish fauna in the vicinity of Santa Ana del Yacuma in Bolivia (río Mamoré drainage). Biota Neotropica , 12 (4), 156-165.