Epalzeorhynchos

Epalzeorhynchos kalopterum

Photo of aquarium fish Epalzeorhynchos
Natural range
  • Borneo area
  • Sumatra area
Cyprinids

Family:Cyprinids (Cyprinidae)

Other scientific names: Barbus kalopterus, Epalzeorhynchus callopterus, Epalzeorhynchus kallopterus

The Red-Finned Epalzeorhynchos, scientifically known as Epalzeorhynchos kalopterum, belongs to the carp family (Cyprinidae) and is often referred to as the Flying Fox. This active fish, while not boasting original coloration, is valued by aquarists for its unpretentiousness and high endurance, contributing to its popularity in the aquarium trade.

Required aquarium volume
from 200 L
Size in aquarium
14 cm
Temperature
22 – 26 °C
Temperament
Territorial (often aggressive)
Parameters
Temperature22 – 26 °C
Water pHNeutral (6.5) – Neutral (7)
Water dHSoft (5) – Medium hardness (8)
Water salinityno salt (freshwater)
Size in aquarium14 cm
Lifespan10 years
TemperamentTerritorial (often aggressive)
Toward small fishnot a predator
Required aquarium volumefrom 200 L
Lightingmoderate (regular)
Substratesand or gravel + stones/boulders
Water flowmoderate
FeedingPlant-based with meat additives
KeepingSolitary

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Epalzeorhynchos get?

An adult reaches 14 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Epalzeorhynchos need?

The recommended volume is 200 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Epalzeorhynchos need?

Temperature 22–26 °C, pH 6.5–7, hardness 5–8 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Epalzeorhynchos live?

Around 10 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Epalzeorhynchos aggressive?

Temperament: territorial (often aggressive). Keep this in mind when choosing tank mates.

How many Epalzeorhynchos should be kept together?

Recommended setup: solitary. Ignoring this is a common cause of stress and disease.

What does Epalzeorhynchos eat?

Diet type: plant-based with meat additives. Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Epalzeorhynchos?

The scientific name of the species is Epalzeorhynchos kalopterum, family Cyprinids (Cyprinidae). It also appears in the literature as: Barbus kalopterus, Epalzeorhynchus callopterus, Epalzeorhynchus kallopterus.

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