Overview: Black (Flying) Fox

• The Flying Fox (Epalzeorhynchos kalopterus), often referred to simply as the “Flying Fox,” is a Southeast Asian freshwater fish closely related to the Red-tailed Black Shark. It’s especially valued for its striking coloration and algae-eating habits.
• Notable features include:
• Long body with flat underside
• Olive to dark brown dorsal area, pale yellowish-white underside
• Distinctive brownish-black horizontal stripe (mouth to tail), topped by a thinner gold stripe
• Translucent fins edged with bold black bands

Care & Behavior

• Diet & Algae Control
  Excellent grazers, Flying Foxes help manage green algae and biofilm, but should also receive a varied omnivorous diet including plant matter and occasional meaty foods.
• Temperament
  Primarily peaceful when young, but may grow territorial over time—especially in smaller tanks or when kept in low numbers.
• Aquarium Needs
• Requires moderate to strong water flow and ample open space
• Preferred habitat imitates their wild environment: rocky or driftwood-lined streams
• Tank size should be at least 40 gallons for a single fish; 50+ gallons recommended for adults

Quick Facts

Summary

The Black (Siamese) Flying Fox is a captivating, active algae eater prized for its bold stripes and active bottom-to-mid swimming behavior. Perfect for well-structured, plant-rich tanks with steady flow and secure swimming space. Although peaceful initially, they can become territorial—adequate tank size and hiding spots are essential.