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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.
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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.
Tank Mates
Similar water parameters and robust enough not to be bullied; avoid fin-nipping issues by keeping barbs in groups
Active mid-water swimmer that occupies a different zone and shares compatible water conditions
Shares similar water parameters and bottom-dwelling habits; both are nocturnal and generally coexist well
Large, robust fish that won't be intimidated and occupies mid to upper water column
Both are bottom dwellers and may compete for hiding spots; ensure plenty of caves and space
Compatible water parameters and occupies similar zones; both are active scavengers but generally tolerate each other
Common Diseases
Ich (White Spot Disease)
Small white spots resembling grains of salt on body and fins, flashing or rubbing against objects, lethargy
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)
Frayed or rotting fins, white or gray patches on body, ulcers, lethargy
Improve water quality immediately, perform partial water changes, treat with antibacterial medication such as kanamycin or nitrofurazone
Fungal Infection
Cotton-like white or gray tufts on body, fins, or around wounds
Treat with antifungal medication such as methylene blue or pimafix; improve water quality and remove any injured fish to a quarantine tank
Internal Parasites
Hollow belly despite eating, white stringy feces, weight loss, lethargy
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)