Altum Orinoco F1 Adult

Altum Orinoco refers to Pterophyllum altum, the true altum angelfish, one of the most iconic and demanding species in aquaristics.

What it is

• Scientific name: Pterophyllum altum
• Origin: Orinoco river basin (Venezuela and Colombia), including tributaries with clear and blackwater, low mineralization.
• Differentiation: Not a “common large angelfish”. The true altum has a taller body, a distinct concave head profile, and very long fins.

Key characteristics

• Total height (with fins): can exceed 35–40 cm
• Behavior: peaceful, but sensitive to stress
• Life expectancy: 8–10 years (or more, in ideal conditions)

Recommended aquarium

• Minimum height: 50 cm (60–70 cm is ideal for adults)
• Volume: from 400–500 L for a small group
• Layout:
  • Vertical driftwood (roots)
  • Low direct light
  • Plants resistant to warm and acidic water (or dried leaves)
• Filtration: powerful but with gentle flow

Feeding

• Prefer high-quality foods:
  • Brine shrimp, krill, larvae (frozen or live)
  • Premium pellets specific for cichlids
• Juveniles require frequent feeding and pristine water to grow well.

Many fish sold as “altum” are actually:

• Pterophyllum scalare “altum‑like”
• Pterophyllum leopoldi

Actual photos of the animals for sale