Description
Overview:
The Asian Upside-Down Catfish (Mystus leucophasis) is a fascinating and unique species named for its habit of swimming belly-up, especially when feeding at the water’s surface or resting under driftwood. With its sleek, torpedo-shaped body, long barbels, and shimmering silver-to-dark coloration, this nocturnal oddball brings both character and movement to medium-to-large freshwater tanks.
Origin:
Native to Southeast Asia, particularly the Irrawaddy River basin in Myanmar, Mystus leucophasis inhabits slow-moving rivers, swamps, and flooded forests where it hunts at dusk and dawn.
Feeding:
An opportunistic omnivore, this catfish accepts a wide variety of foods including sinking pellets, bloodworms, brine shrimp, insect larvae, and frozen meaty foods. Will also feed near the surface—often upside down—making it a joy to watch during mealtimes.
Tank Mates:
Peaceful to semi-aggressive depending on size and environment. Best kept with similar-sized or larger peaceful fishsuch as gouramis, rainbowfish, larger barbs, loaches, or calm cichlids. Avoid small fish or shrimp, which may be mistaken for food.
Water Parameters:
-
Temperature: 75–82°F (24–28°C)
-
pH: 6.5–7.5
-
Moderate hardness
-
Minimum Tank Size: 55 gallons
-
Provide plenty of driftwood, hiding spots, and dim lighting
Behavior & Compatibility:
-
Nocturnal but may become more active in dim tanks
-
Best kept in groups of 3 or more for natural schooling behavior
-
Prefers low to moderate flow, subdued lighting, and soft substrate
Special Notes:
-
Can grow up to 8–10 inches, so needs ample swimming space
-
Extremely hardy once established
-
Will thrive in planted or natural setups with cover and structure
-
Captivating for aquarists who enjoy unusual behaviors and oddball species
The Asian Upside-Down Catfish is a mysterious, elegant, and intelligent species that adds motion and intrigue to any large freshwater aquarium. Its unique swimming style and peaceful temperament make it a standout choice for aquarists looking for something different.
