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FishmediumFreshwater

Asian Bumblebee Catfish

Pseudomystus siamensis

📍 Southeast Asia

The Asian Bumblebee Catfish (Pseudomystus siamensis) is a striking nocturnal catfish from Southeast Asia, featuring bold yellow and black banding reminiscent of a bumblebee. It is a popular choice for hobbyists seeking an interesting bottom-dwelling species that adds personality to a community aquarium. Though somewhat secretive during the day, it becomes more active at night and can be a rewarding fish for intermediate keepers.

Size5"
Min Tank30g
semi-aggressive
Zonebottom

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Care Guide

Diet

The Asian Bumblebee Catfish is a carnivore that thrives on a varied diet of sinking carnivore pellets, frozen or live bloodworms, tubifex worms, and brine shrimp. It is primarily a nocturnal feeder, so it is best to offer food after lights out to ensure it competes successfully for meals. Feed once daily or every other day, being careful not to overfeed as uneaten food can quickly foul the substrate.

Behavior

This catfish is largely nocturnal and spends much of the day hiding among caves, driftwood, and dense vegetation. At night it becomes more active, patrolling the bottom in search of food. It can be semi-aggressive toward similarly sized bottom dwellers and may prey on very small tankmates such as tiny shrimp or nano fish, so tankmate selection should be considered carefully.

Breeding

Breeding Pseudomystus siamensis in captivity is rarely achieved and considered difficult. Little is documented about their specific breeding triggers, but conditioning with live foods and simulating a rainy season with slightly cooler, softer water changes may encourage spawning behavior. Dedicated breeding setups with caves and reduced lighting are recommended if attempting to breed this species.

Common Diseases

Ich (White Spot Disease)

Symptoms

Small white spots resembling grains of salt on body and fins, flashing or rubbing against objects, lethargy

Treatment

Raise temperature gradually to 28-30°C, treat with ich-specific medication such as malachite green or formalin; catfish can be sensitive to medications so use half doses

Bacterial Infection (Columnaris/Fin Rot)

Symptoms

Frayed or rotting fins, white or gray patches on body, ulcers, lethargy

Treatment

Improve water quality immediately, perform partial water changes, treat with antibacterial medication such as kanamycin or nitrofurazone

Fungal Infection

Symptoms

Cotton-like white or gray tufts on body, fins, or around wounds

Treatment

Treat with antifungal medication such as methylene blue or pimafix; improve water quality and remove any injured fish to a quarantine tank

Internal Parasites

Symptoms

Hollow belly despite eating, white stringy feces, weight loss, lethargy

Treatment

Treat with antiparasitic medication such as metronidazole or praziquantel added to food or water; quarantine affected fish

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Quick Facts

diet
Carnivore – sinking pellets, frozen/live bloodworms, tubifex, brine shrimp
lifespan
5-8 years
max size
13 cm (5 in)
tank size
30 gallons minimum
temperament
semi-aggressive

Water it likes

ph
6.0-7.5
ammonia
0 ppm
nitrate
<20 ppm
hardness
2-15 dGH
temperature
72–82°F (22–28°C)

Stats

Community tips0
Kept by0 hobbyists