Flying Fox - Epalzeorynchus Kalopterus

Flying Fox (Epalzeorhynchos kalopterus)

The Flying Fox is a sleek, active freshwater fish best known for its algae-eating abilities and striking colour pattern. With a golden-brown body, a bold black stripe running from nose to tail, and golden highlights on the fins, this species is both attractive and useful in the aquarium. Unlike some similar-looking fish, the Flying Fox has clear fin markings with white and orange edging on the caudal and dorsal fins.

Native to fast-flowing rivers and streams of Southeast Asia, the Flying Fox is hardy, energetic, and constantly on the move, making it a great addition to larger community aquariums.

Why We Love Them

• Excellent algae eaters that help control algae growth

• Striking appearance with a bold black stripe and fin highlights

• Active swimmers that add movement and personality

• Hardy and adaptable to a wide range of freshwater setups

Tank Setup

Flying Foxes prefer aquariums with plenty of swimming space, strong water flow, and ample hiding places created with driftwood, rocks, and plants. A tight-fitting lid is essential, as they are known jumpers. As they mature, they can become territorial, so they are best kept singly unless housed in very large aquariums.

Feeding

While well known for grazing on algae, Flying Foxes should not be relied on for algae control alone. They are omnivores and require a varied diet including high-quality sinking pellets, algae wafers, blanched vegetables such as zucchini or spinach, and occasional protein-rich foods like brine shrimp or bloodworms.

Tank Mates

Flying Foxes are generally peaceful when young but may become territorial with age, especially toward similar-looking species. They do well with fish of similar size and temperament, including barbs, gouramis, rasboras, rainbowfish, and larger tetras. Avoid housing them with very small or slow-moving fish that may be harassed.

Care Information

• Temperature: 23–27°C (73–81°F)

• pH: 6.0–7.5

• KH: 2–12 dKH

• Tank size: Minimum 120 litres (30 gallons)

• Adult size: Up to 15 cm (6 inches)

• Origin: Tank-bred; wild populations originate from Southeast Asia

The Flying Fox is a hardy, active, algae-grazing fish that makes both a practical and attractive addition to larger freshwater community aquariums.