Origin
Native to blackwater swamps and forest streams of Borneo, Sumatra, and the Malay Peninsula. Prefers low-flow, tannin-rich environments.

Visual & Functional Appeal
Stocky, flattened body with a wide, frog-like mouth and camouflage mottling that mimics leaf litter. Its stillness and sudden lunging movements make it one of the most bizarre fish to observe.

Purpose
Strictly a predator and display oddity—used in species-only or biotope aquariums to showcase unique fish adaptations. Not a community tank fish.

Importance
This catfish is often overlooked but serves as a fascinating case of extreme specialization. Great for keepers interested in behavioral diversity and stealth predators.

Included Resources
Needs a soft sand or fine gravel substrate for burrowing. Prefers dim lighting, leaf litter, and cover. Filtration must be gentle, and water should be clean but slightly acidic (pH 5.5–7). Ideal temperature: 75–82°F.

Best Use Cases
Southeast Asian blackwater biotopes, species-only tanks, or as a centerpiece in “oddball” fish displays. Avoid mixing with smaller tankmates—this species will eat anything it can swallow.

Conservation Context
Not assessed by the IUCN. Habitat degradation in Southeast Asia poses long-term risk. Wild-caught trade is common, making sustainable sourcing essential.

Ideal Tank Mates
• Best kept alone or with equally large, non-aggressive fish
• Compatible with other Chaca species or armored catfish in very large tanks
• Avoid all small or active species

Region (A)
• Latitude: 1.3521° N
• Longitude: 103.8198° E
(Singapore region – lowland forest streams)

Region (B)
• Latitude: -0.7893° S
• Longitude: 113.9213° E
(Central Kalimantan, Borneo – peat swamp habitat)