Pterophyllum Altum (Wild Caught) 1.5″-2″

The Pterophyllum altum, commonly known as the Altum Angelfish or Orinoco Angelfish, is one of the most elegant and sought-after species of freshwater angelfish. It is revered for its tall, laterally compressed body and graceful swimming style. Native to the Orinoco and Amazon river basins in South America, Altum angelfish are often distinguished by their unique appearance and specific care requirements, making them a favorite among experienced aquarists.

• Appearance:
  • Body: Altum angelfish are taller and more vertically elongated than the more common Pterophyllum scalare species. They have long, flowing dorsal and anal fins that extend far above and below their bodies, giving them a majestic appearance.
  • Coloration: Their bodies are typically silver with three broad, dark vertical bars, along with additional faint bands in between. The fins often have a reddish or orange tint, particularly around the face and dorsal area, and their bodies can show iridescent hues under the right lighting.
  • Size: Altum angelfish can grow up to 35 cm (14 inches) tall from the top of their dorsal fin to the bottom of their anal fin, and about 15–18 cm (6–7 inches) in length.
• Habitat:
  • Native regions: Found primarily in the blackwater rivers of the Orinoco and upper Rio Negro basins in Colombia and Venezuela.
  • Environment: They are typically found in slow-moving, soft, and acidic water, often in areas with submerged roots, driftwood, and overhanging vegetation.

• Feeding habits: In the wild, Altum angelfish feed on small invertebrates, insect larvae, and plant matter. In captivity, they can be fed a variety of high-quality flake foods, pellets, live or frozen foods like brine shrimp, bloodworms, and daphnia. It is essential to provide a varied diet to keep them healthy.
• Temperament: Altum angelfish are generally peaceful but can show mild territorial behavior, especially when paired or during breeding. They do best in a calm environment with similarly peaceful tank mates.

• Tank size: Due to their size and tall body, Altum angelfish require a spacious tank with a height of at least 60 cm (24 inches). A minimum of 75 gallons is recommended for a group, though a larger tank is always better for long-term care.
• Water conditions: Altum angelfish require soft, acidic water (pH 4.5–6.5) with a temperature range of 26–30°C (79–86°F). They are sensitive to water conditions, and stable, pristine water quality is essential. Regular water changes and powerful filtration are needed to maintain the water’s softness and cleanliness.
• Aquascape: A well-structured tank that mimics their natural habitat is ideal. Use driftwood, vertical pieces of wood, rocks, and plants to create hiding places and territories. The substrate should be soft, such as sand or fine gravel. Plants like Amazon swords or Vallisneria are good choices, as they resemble their natural surroundings.
• Diet: They should be fed a varied diet that includes high-quality flake or pellet foods, supplemented with live or frozen foods such as bloodworms, brine shrimp, and mysis shrimp. Altums can be somewhat slow feeders, so ensure they get their fair share during feeding times, especially when housed with faster fish.

• Reproduction: Breeding Pterophyllum altum in captivity is rare and challenging, though not impossible. They are pair-bonding, egg layers, typically spawning on broad leaves or vertical surfaces. However, providing the right water conditions is crucial to success, especially keeping the water soft and acidic. After the eggs are laid, both parents will protect and fan them. The fry are delicate and require special care, including soft water and appropriate foods like infusoria or finely powdered foods.

• Tank mates: Altum angelfish are peaceful but should be housed with other non-aggressive species due to their sensitivity and slow-moving nature. Suitable tank mates include tetras (such as rummy-nose or cardinal tetras), corydoras catfish, discus, and other peaceful, slow-moving South American fish. Avoid aggressive or fin-nipping species like barbs or larger, boisterous cichlids.
• Behavioral notes: While Altum angelfish can coexist with other peaceful fish, they may become territorial when breeding or stressed. Always ensure there’s enough space for each fish to establish its own territory.

• Water quality: Altum angelfish are highly sensitive to water quality, and maintaining consistent soft, acidic water is crucial for their health. Regular water changes, high-efficiency filtration, and careful monitoring of pH and hardness levels are necessary.
• Experience level: Due to their sensitivity to water conditions and their need for specific care, Altum angelfish are best suited for experienced aquarists who have a good understanding of water chemistry and the patience to maintain stable tank conditions.