Xenotaenia resolanae
Xenotaenia resolanae
The Xenotaenia resolanae (Xenotaenia resolanae) is a semi-aggressive fish that's a good step up once you have a little experience. Give it a tank of at least 100 litres (26 US gallons), water held at 64-75°F, and a pH of 7-8. Always keep a group of at least 6 - they feel safest in numbers.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Central America
- Central America & Mexico
Regional colours match the stocking calculator's origin map.
Xenotaenia resolanae Tank Setup
A tank of at least 100 litres (26 US gallons) works well. Keep the water at 64-75°F with a pH around 7-8, and set up both cover and open swimming space where they spend most of their time (Mid). Always keep a group of at least 6 of their own kind - kept alone or in pairs they tend to turn shy, nippy, or wash out in colour.
What Do Xenotaenia resolanaes Eat?
They're not fussy eaters - feed a varied diet, rotating good-quality dry, frozen, and gel foods rather than the same thing every day, and match the food size to their mouths.
Xenotaenia resolanae Tank Mates
Rare Mexican goodeid; critically endangered in wild. Keep in groups. Cool water goodeid enthusiast fish. The Xenotaenia resolanae is semi-aggressive, which is the first thing to weigh up when you choose tank mates. It's a known fin-nipper, so avoid bettas, guppies, and other slow, long-finned fish. It's a shoaling fish, so settle a group of 6 or more of its own kind before adding anything else - a stressed, lonely fish is far more likely to nip or hide. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Xenotaenia resolanaes Good for Beginners?
Doable once you test water regularly and catch problems before fish look sick. If this is your first tank, pick something more forgiving and come back later.
Xenotaenia resolanae - frequently asked questions
What size tank do Xenotaenia resolanaes need?
Xenotaenia resolanaes need a tank of at least 100 litres (26 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
How many Xenotaenia resolanaes should I keep together?
Keep a group of at least 6. Xenotaenia resolanaes are a shoaling species and become stressed, lose their colour, or hide when kept singly or in pairs.
What water parameters do Xenotaenia resolanaes need?
Keep them at 64-75°F with a pH of 7-8, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Xenotaenia resolanaes eat?
Xenotaenia resolanaes are omnivores and aren't fussy eaters. Feed a varied mix of good-quality dry, frozen, and gel foods, and match the food size to their mouths. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Xenotaenia resolanaes good for beginners?
Xenotaenia resolanaes are best for keepers with a little experience. They are manageable once you test water regularly and catch problems early; a complete beginner may prefer something more forgiving first.
Common mistakes with Xenotaenia resolanaes
- Buying fewer than 6 - Xenotaenia resolanaes need a proper school to feel secure; isolated individuals hide, fail to colour up, or become stressed.
- Underestimating tank size - the minimum footprint is 100 litres (26 US gallons); impulse buying into a smaller tank leads to stress and shortened lifespan.
- Mixing with long-finned fish - Xenotaenia resolanaes will nip at bettas, angelfish, and other fish with flowing fins, causing stress and infection risk.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Xenotaenia resolanaes
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- AxolotlPredator - Axolotl will eat or injure smaller tank mates
- Betta (Male)Predator - Betta (Male) will eat or injure smaller tank mates
