Blackhawk catfish
Wallagonia micropogon
The Blackhawk catfish exhibits a streamlined body, dark grey to brown coloration, and elongated pectoral and dorsal fins.
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About the Blackhawk catfish
Wallagonia micropogon is a giant Southeast Asian sheatfish with an eel-like body and a huge, scoop-like mouth for hunting other fish. It is native to the Mekong and middle Chao Phraya basins and was long confused with Wallagonia leerii, which makes IDs and care notes tricky. Stunning as a juvenile but it grows to true megafish size, so it is only realistic for expert keepers or public aquariums.
Also known as
Quick Facts
Size
154 cm SL
Temperament
Semi-aggressive
Difficulty
Expert
Min Tank Size
300 gallons
Lifespan
10-20 years
Origin
Southeast Asia
Diet
Piscivore - feeds on fish; juveniles may take meaty prepared/frozen foods
Water Parameters
22-26°C
6-7
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This species needs 22-26°C in a 300 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- This is a true megafish: Blackhawk catfish (Wallagonia micropogon) can reach 154 cm SL, so plan for a public-aquarium scale setup; the bare minimum is a 300-gallon tank with a long footprint.
- Keep water at 22-26 C and pH 6-7; run multiple high-capacity filters and do big, regular water changes to keep waste in check.
- It is a piscivore; adults want whole fish, while juveniles may accept meaty prepared or frozen foods.
- Skip feeder fish and use clean frozen or fresh offerings to avoid disease hitchhikers.
- Semi-aggressive and very predatory: tankmates must be very large and robust, and anything it can fit in that scoop-like mouth will be eaten.
- Give it lots of open swimming room plus a couple of oversized shelters made from smooth wood, rock, or big pipe; avoid sharp decor that can scrape its long, eel-like body.
- This species was long confused with Wallagonia leerii; double-check the ID when buying and plan for micropogon-size growth.
- Home-aquarium breeding is not documented; do not expect to breed this species.
Compatibility
Good Tankmates
- Adult Asian arowana or similar top-dwelling megafish that are too large to be swallowed; introduce at comparable size in a very large, low-aggression setup
- Adult giant gourami (Osphronemus) - deep-bodied, robust, generally non-nippy, and occupy upper/middle levels
- Adult clown knifefish (Chitala) of comparable size, with ample swimming room and multiple hides to reduce nighttime encounters
- Very large Pangasius-type catfish (e.g., iridescent shark) that are fast, midwater, and of equal or greater size; only in public-aquarium scale tanks
- Truly massive, deep-bodied cyprinids from soft to neutral water that are far too big to be eaten (public aquarium scale only)
- No tankmates in private setups - best kept alone due to extreme size and predatory behavior unless you have a public-aquarium scale system
Avoid
- Any fish small enough to fit in its mouth (examples: tetras, small/medium barbs and loaches, corydoras, juvenile cichlids) - they will be eaten
- Slow or long-finned fish that cannot evade sudden lunges (examples: angelfish, discus, fancy goldfish)
- Fin-nippy or abrasive species that harass large tankmates (examples: tiger barbs and other notorious nippers; large plecos that rasp slime coats)
- Other large bottom-dwelling predatory catfish or conspecifics (e.g., redtail catfish, big Hemibagrus, other sheatfish) - high risk of territorial fights or injury
Blackhawk catfish (Wallagonia micropogon) are giant Southeast Asian sheatfish with an eel-like body and a huge, scoop-shaped mouth built to hunt other fish. Stunning as juveniles, they grow into true megafish and demand space, filtration, and handling skills that put them firmly in expert-only territory.
This species reaches around 154 cm SL and can live 10-20 years. A realistic minimum is 300 US gallons, and even that is short-term for many specimens. Long-term housing is often beyond home aquaria; public aquariums are better suited.
Origin and natural habitat
Native to the Mekong and middle Chao Phraya basins of Southeast Asia, Wallagonia micropogon is a freshwater predator that patrols large river systems. It was long confused with Wallagonia leerii, which complicates older identification notes and care reports.
Aquarium setup and water conditions
Plan for an exceptionally large, open layout in at least 300 US gallons, prioritizing footprint and uninterrupted swimming space. Use sturdy, smooth decor if you add structure; avoid sharp or unstable items a powerful fish could dislodge.
- Temperature: 22-26 C
- pH: 6-7
- Water type: freshwater
Filtration must be oversized and reliable. Large predatory fish produce heavy waste, so aim for strong biological capacity, high oxygenation, and big, regular water changes. Keep parameters steady; abrupt swings stress large catfish and can lead to rapid decline.
Diet and feeding
A strict piscivore. The core diet should be appropriately sized fish items. Many juveniles accept meaty prepared or frozen foods, which you can use to wean them from live prey.
- Suitable foods: whole fish or fish pieces; juveniles may take quality meaty frozen items
- Feeding rhythm: offer small, frequent meals for juveniles; fewer, substantial feedings for large subadults/adults
- Avoid feeder goldfish or other cyprinids due to disease risk and thiaminase; source parasite-free foods
Do not overfeed. Large predators put on fat quickly in captivity; keep a steady schedule and adjust portions to body condition and activity.
Behaviour and tankmates
Semi-aggressive but strongly predatory. Any fish small enough to fit in its mouth will be eaten. Interactions with similarly sized fish are unpredictable, especially in confined spaces.
- Best approach: keep a single specimen
- If attempted, only consider very large, robust, non-preylike tankmates in extremely spacious quarters
- Provide ample room and visual space to reduce tension
Common problems and how to avoid them
- Misidentification: This species was often confused with Wallagonia leerii. Confirm ID before planning long-term housing.
- Undersized tanks: Long-term confinement stunts growth and leads to injuries. Plan for massive space from the start.
- Water quality: High waste output can overwhelm filters. Oversize filtration and keep a strict water-change routine.
- Feeding issues: Some individuals fixate on live prey. Start juveniles on frozen meaty items early to expand food acceptance.
Care difficulty: expert. This fish is not a community species and not a casual upgrade from common catfish. Budget for very large equipment and long-term space needs.
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