How to Identify Freshwater Angelfish

To identify Freshwater Angelfish (Pterophyllum), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Wild-type P. scalare typically have silver bodies with four vertical black stripes. Captive breeding has produced numerous color morphs (e.g., marble, koi, black, albino, platinum) and fin variations (e.g., veil, super veil). P. altum often have a more golden or brownish hue with more pronounced and sometimes broken vertical stripes, and a distinct nuchal concavity. P. leopoldi are smaller and have a distinct black spot at the base of the dorsal fin and a shorter snout.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Laterally compressed, disc-shaped body, Elongated dorsal and anal fins, Long, filamentous pelvic fins, Distinctive vertical barring (in wild types)

Dorsal fin

Tall and triangular, extending along a significant portion of the back, often with 11-13 spines and 26-30 soft rays in P. scalare.

Tail fin

Fan-shaped, typically symmetrical, with 16-18 rays.

Pectoral fin

Small and rounded, positioned high on the body.

Distinctive fins

Pelvic fins are greatly elongated and filamentous, often extending beyond the caudal fin, serving as sensory organs.

Identification Tips

1. 1

   Body Shape

   Look for the characteristic highly compressed, disc-like body. This distinguishes them from most other cichlids.

2. 2

   Fin Length

   Observe the exceptionally long, flowing dorsal, anal, and especially pelvic fins. The pelvic fins are often thread-like.

3. 3

   Vertical Barring

   Wild-type angelfish typically display prominent vertical black stripes on a silver body. The number and intensity of these stripes can vary.

4. 4

   Nuchal Concavity (P. altum)

   Pterophyllum altum can be distinguished by a distinct concavity or 'notch' above the eyes, giving the head a more angular profile compared to the smoother curve of P. scalare.

5. 5

   Dorsal Fin Spot (P. leopoldi)

   Pterophyllum leopoldi is identifiable by a prominent black spot at the base of its dorsal fin, which is usually absent or less defined in other Pterophyllum species.

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