Flying Fox
Epalzeorhynchos kalopterus
Flying Fox (Epalzeorhynchos kalopterus) — Varies care, Peaceful, under Other. Minimum tank in the app: 37 US gal min; aim for 68–79°F and pH 6.5–7.5. The Flying Fox appeals to aquarists interested in dynamic mid-water swimmers with unique feeding habits.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Flying Fox Tank Setup
Create a balanced environment with open swimming areas complemented by dense plant coverage to reduce stress and encourage natural behaviors. A moderate flow mimics their natural habitat, while a substrate that allows for foraging will keep them engaged. Lighting should be moderate, highlighting their colors without overwhelming them.
What Do Flying Foxs Eat?
Flying Foxes are opportunistic feeders with a moderate feeding rate that can lead to competition with faster, more assertive species. Ensure a varied diet including plant material to maintain their health and vibrancy.
Flying Fox Tank Mates
Ideal companions include other mid-water swimmers or peaceful bottom dwellers that won’t compete for territory. Larger, assertive fish can lead to aggression, while small, timid species might be bullied. Intraspecies interactions can be managed by providing adequate space; a single individual can be kept, but they can thrive in small groups if conditions are optimal.
Are Flying Foxs Good for Beginners?
Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the impact of tank size and structure on the Flying Fox's behavior, leading to territorial disputes or stress. Overcrowding and poor water conditions can exacerbate aggression and health issues.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




