Angelfish

Physical Characteristics

The Angelfish (Pterophyllum scalare) has a distinctive, laterally compressed, disc-shaped body with long, flowing dorsal and anal fins, giving it a triangular or arrow-like silhouette. The caudal fin is fan-shaped, and the pectoral fins are typically small. Its pelvic fins are elongated and filamentous. The coloration in the image appears to be a marbled or striped pattern of dark gray/black and lighter white/silver tones. Other common color variations include silver, gold, black, koi, and various marble patterns. They have small scales and relatively large eyes. The body can reach up to 6 inches (15 cm) in length, excluding the fins.

Habitat & Distribution

Native to the Amazon Basin in South America, specifically in slow-moving or stagnant waters, floodplains, and swamps with dense submerged vegetation and roots. They prefer clear to blackwater conditions. They are found in countries such as Peru, Brazil, Colombia, and Ecuador. In captivity, they are freshwater aquarium fish that prefer well-planted tanks with open swimming areas.

Size & Weight

In the wild, Angelfish can grow up to 6 inches (15 cm) in body length and almost 10 inches (25 cm) including finnage. In aquariums, they typically reach similar sizes, with some larger specimens exceeding these measurements. Their weight is generally proportional to their size, usually a few ounces for a fully grown adult.

Similar Looking Species

Other species within the Pterophyllum genus, such as Pterophyllum altum (Altum Angelfish) and Pterophyllum leopoldi (Leopold's Angelfish), are similar. P. altum is generally larger with a more elongated nose and more pronounced vertical stripes, while P. leopoldi is smaller, has a straighter dorsal head profile, and a distinct black spot at the base of the dorsal fin.

Ecological Role

Angelfish are omnivorous, primarily feeding on small invertebrates, zooplankton, and plant matter in their natural habitat. They are a prey species for larger fish and aquatic birds. In the aquarium trade, they are one of the most popular cichlids. Their conservation status is generally 'Least Concern' according to the IUCN Red List due to their wide distribution and stable populations in the wild. Captive breeding programs also contribute significantly to their continued existence.

Identified on: 11/9/2025

Mode: Standard