Maximum size : 15 cm

True Flying Fox - Epalzeorhynchos kalopterus : Complete Fish Profile & Care Guide

Table of contents

Introduction

The True Flying Fox (Epalzeorhynchos kalopterus) is a stunning fish that any hobbyist would love to keep. With its unique body shape and striking colours, this fish is sure to grab attention in any aquarium. However, it is important to keep in mind that these fish are best kept as solitary individuals due to their territorial nature. They can become aggressive towards their own kind and other similar-shaped fish, such as the Rainbow and Red-Tailed Shark, as well as Garra species, including the very similar-looking False Siamese Algae Eater (Garra cambodgiensis).

While keeping multiple True Flying Foxes in an aquarium is possible, it requires a significant amount of space and hiding places to avoid potential conflicts. However, these fish are generally compatible with most other types of aquarium fish, including Loaches, Barbs, Danios, Tetras, and even very small Rasboras, making them excellent community aquarium members.

To establish an optimal aquatic environment for True Flying Fox, it is advisable to engage in meticulous aquascaping endeavours. A substrate composed of soft sand or finely rounded gravel should be employed, complemented by the strategic incorporation of cobbles, smooth rock formations, and sections of bogwood. Lighting should be set at a moderately bright intensity to stimulate the growth of algae, which serves as a nutritional source for the fish, particularly in terms of microorganisms it may harbour.

Provision of shaded zones can be achieved through the placement of rocks and bogwood, along with the cultivation of hardy plant varieties such as Anubias sp. or Java fern. During the aquascaping process, it is prudent to consider the creation of visual barriers within the aquarium to allow for the possibility of minor territorial disputes. This design element affords the fish the opportunity to retreat from one another's line of sight when needed. Additionally, the aquarium's maturity is of paramount importance, necessitating a minimum length of 4 feet, along with provisions for substantial water movement and effective oxygenation to ensure the well-being of the inhabitants.

The True Flying Fox has an elongated body with a flat stomach, a yellowish-white hue on the lower part of its body, and a dorsal region that ranges from olive to dark brown. A brownish-black stripe runs from its mouth to the caudal fin, and on top of that is a striking gold-coloured stripe. In addition, the True Flying Fox has a reddish iris, and its anal, dorsal, and ventral fins consist of a translucent front with a thick black band along the edge.

True Flying Fox Photos

Sexual Dimorphism

Distinguishing between male and female True Flying Fox 's can be pretty tricky, especially for juveniles. However, mature females tend to have a deeper bodies compared to their slimmer male counterparts.

Quick Facts

Scientific NameEpalzeorhynchos kalopterus
Year Described1850
Other NamesFlying Fox
KingdomAnimalia
ClassificationActinopterygii
OrderCypriniformes
FamilyCyprinidae
GenusEpalzeorhynchos
OriginsIndonesia
Max Size15 cm
TemperamentPeaceful
Aquarium LevelBottom
DifficultyBeginner - Intermediate
ShoalingNo
Best kept asLoners
Diet & FeedingOmnivore
ReproductionEgg Depositor
Average LifespanUp to 10 Years

Water Parameters

Water TypeFreshwater
pH 6.0 - 7.5
GH 4 - 12
TDS 36 - 215
Ideal Temperature
72 - 79
22 - 26

Natural Habitat

The True Flying Fox is a stunning fish species that hails from the tropical waters of the Thai Malay Peninsula, Java, Sumatra and Borneo in Indonesia in Southeast Asia. These fish prefer fast-flowing rivers and streams but are also known to move into seasonally forested areas or floodplains during the wet season. Interestingly, these fish can be observed grazing on rocky or sandy substrates, but they have also been seen underneath floating objects such as floating houses, boats, and pockets of dense surface vegetation, which makes them a fascinating species to observe in their natural habitat.

Breeding

As far as current knowledge suggests, there have been no documented instances of successful breeding of the True Flying Fox in home aquariums. Instead, hormone assistance is employed to farm these fish in large quantities for the ornamental trade.

Diet & Feeding

The True Flying Fox is primarily a herbivorous fish that feeds on algae. However, to ensure their optimal health and vibrant colours, they will readily accept high-quality dried foods, such as flakes and granules and algae wafers. To diversify their diet and provide them with essential nutrients, offering them regular meals of small frozen or live foods, such as bloodworms, tubifex, or chopped white worms, is recommended. In addition, incorporating some vegetable matter into their diet, such as zucchini, cucumber, broccoli, and lettuce, can be highly beneficial.

Frequently asked questions

The True Flying Fox can reach a length of about 6 inches (15 cm) in a home aquarium setting.

True Flying Foxes originate from fast-flowing rivers and streams in Southeast Asia. They prefer a freshwater environment with a strong current, plenty of hiding spaces, and a substrate of fine gravel or sand.

They are primarily herbivorous, consuming algae and plant matter in the wild. In an aquarium setting, they should be fed a variety of foods including high-quality vegetable-based flake or pellet food, blanched vegetables, and algae wafers.

The True Flying Fox can be semi-aggressive, especially towards fish of similar size and shape. Therefore, it's best kept with fish that are peaceful but can defend themselves. Suitable tank mates include larger tetras, rasboras, catfish, and gouramis.

Because of their size and active nature, a minimum tank size of 50 gallons is recommended for the True Flying Fox. A larger tank is always better as it allows the fish more room to move and establish territories.

True Flying Foxes thrive in water with a temperature between 72-79°F (22-26°C), a pH range of 6.0 to 7.5, and a water hardness of 5-15 dGH.

With optimal care, a True Flying Fox can live for approximately 8 to 10 years in captivity.

True Flying Foxes have elongated, torpedo-shaped bodies. They are primarily brown to black in color, with a light horizontal line running from the eye to the caudal fin, and reddish-brown fins.

Like many of their kind, True Flying Foxes are difficult to breed in captivity. In the wild, they spawn during the rainy season in large rivers. Simulating these conditions at home can be challenging.

The True Flying Fox should be fed once or twice a day, providing only what they can consume within a few minutes to maintain water quality. A balanced diet of vegetables and high-quality commercial foods will help ensure their health and longevity.

Videos

True Flying Fox (Epalzeorhynchos kalopterus) Freshwater Aquarium Fish Species Profile & Care Guide Thumbnail

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