Atabapo Altum Angelfish (Wild Caught)

Majestic, towering, and truly awe-inspiring — the Atabapo Altum Angelfish (Pterophyllum altum) is the king of freshwater angelfish. Wild-caught from the pristine blackwater rivers of the Atabapo region in Venezuela and Colombia, this is the true Altum angelfish — the largest and most magnificent of all angelfish species, prized by serious collectors and experienced aquarists worldwide.

Overview

Appearance

The Atabapo Altum Angelfish is immediately recognizable by its extraordinary height — the dramatically elongated dorsal and anal fins can reach up to 20 inches from tip to tip, making this the tallest freshwater aquarium fish available. The body displays the classic Altum pattern — a silver to pale gold base with three bold dark vertical bars and a distinctive notch above the mouth that is unique to P. altum. Wild-caught Atabapo specimens are particularly prized for their exceptional size, bold markings, and the pristine quality that comes from their natural blackwater habitat.

Water Parameters & Tank Setup

• Temperature: 78 – 86°F (26 – 30°C)
• pH: 4.5 – 6.0 (soft, acidic blackwater conditions essential)
• General Hardness (GH): 1 – 5 dGH (very soft water required)
• Tank Size: Minimum 75 gallons; 125+ gallons recommended for a group
• Substrate: Dark sand; Indian almond leaves and driftwood to replicate blackwater conditions
• Plants & Decor: Tall plants, driftwood, and open swimming space; very tall aquariums preferred

Diet & Feeding

• Staple: High-quality flake food, pellets, and angelfish-specific foods
• Treats: Frozen bloodworms, brine shrimp, daphnia, and small live foods
• Note: Wild-caught specimens may initially require live or frozen foods to transition to prepared foods

Feed 2–3 times daily.

Compatibility & Tank Mates

Best kept in a species-only or carefully chosen community with similarly sized, peaceful blackwater fish. Good tank mates include Cardinal Tetras, Rummy Nose Tetras, and other soft-water species. Avoid boisterous or aggressive fish.

The Atabapo Altum Angelfish is the ultimate freshwater angelfish — majestic, towering, and breathtaking. A true trophy fish for the experienced and dedicated aquarist.