
The Deep Angelfish, pterophyllum altum, also known as the Altum Angelfish, is a striking freshwater fish native to the Orinoco and Amazon basins of South America. It is the largest species within the Pterophyllum genus, with adults capable of reaching up to 18 cm in height and 15 cm in length. Characterized by its majestic, elongated fins and slender body, the Altum Angelfish displays a captivating coloration of silver with brown or black vertical stripes, enhancing its presence in the aquatic environment.

| Population: | Not fully assessed, but popular in the aquarium trade |
| Generation Length: | 3-4 years |
| Average Weight: | Not typically recorded due to small size |
| Average Length: | Up to 18 cm in height |
| Lifespan: | 10-15 years in captivity |
| Diet: | Omnivorous, with a diet that includes a variety of food sources found in their natural habitat |
| Conservation Status: | Not Evaluated (NE) |
The natural habitats of the Deep Angelfish are slow-moving, clear water rivers and floodplain areas where dense vegetation provides shelter and breeding sites. These conditions are essential for their survival, offering protection from predators and a rich source of food. Altum Angelfishes are known for their shy and peaceful demeanor, thriving in well-planted aquariums that mimic their natural environment.
The diet of the Deep Angelfish in the wild consists predominantly of small crustaceans, insect larvae, and other tiny aquatic organisms. In captivity, they adapt well to a variety of foods, including flakes, frozen, and live foods, highlighting their omnivorous nature. Proper nutrition is vital for maintaining their health and vibrant coloration.
Reproduction among Deep Angelfish involves complex courtship behaviors, with pairs forming strong bonds. They are known to clean a vertical surface, such as a leaf or aquarium glass, where the female lays eggs that the male then fertilizes. Both parents exhibit protective behaviors, guarding the eggs and, later, the fry from potential threats.
The population of the Deep Angelfish in the wild faces challenges from habitat destruction and pollution. While not currently listed as endangered, their reliance on specific habitat conditions makes them vulnerable to environmental changes. In the aquarium trade, the Altum Angelfish is highly prized for its beauty and grace, contributing to its popularity among enthusiasts. Conservation efforts and sustainable aquarium trade practices are essential to ensure the preservation of this magnificent species in the wild and in captivity.
Swimming
Can be territorial, especially during breeding
Graceful and slow-moving
Omnivore
Freshwater environments, primarily in deep river channels and floodplains
Sedentary, with movements influenced by water levels and breeding seasons
Native to the Orinoco and Amazon River basins in South America
Prefers warm, soft, acidic water conditions
Larger fish, birds, and aquatic mammals
Small invertebrates, detritus, and plant matter
Feeds on a mix of animal and plant materials, including insects, small crustaceans, and vegetation
Omnivorous, with a diet that includes a variety of food sources found in their natural habitat
Monogamous, forming pairs during breeding season
Hundreds of eggs, depending on conditions
Eggs hatch within a week after laying
Deep Angelfish are stunning freshwater fish known for their tall, elegant fins and unique shape.
They originate from the Amazon Basin and thrive in slow-moving waters. These fish can reach heights of up to 15 inches and are known for their peaceful nature. They are popular in aquariums due to their striking appearance.



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