How to Identify Convict Cichlid

To identify Convict Cichlid (Amatitlania nigrofasciata), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The base body color ranges from light grey to bluish-grey, overlaid with 8-9 prominent, irregular black vertical bars extending from the dorsal fin to the ventral side. Males are generally larger and more elongated, often developing a nuchal hump (fatty lump on the forehead) with age, especially during breeding. Females are typically smaller, rounder, and often display an orange or gold patch on the dorsal fin and/or flanks, particularly when breeding. Albino and marbled color morphs are also common in the aquarium trade.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

8-9 prominent black vertical bars, Sexual dimorphism: males larger, nuchal hump; females smaller, rounder, often with orange/gold coloration on dorsal fin/flanks, Protrusible mouth with small, conical teeth

Dorsal fin

Long, continuous dorsal fin with 16-18 spines and 8-10 soft rays. The posterior part of the soft-rayed dorsal fin is often pointed in males.

Tail fin

Rounded to slightly truncate caudal fin.

Pectoral fin

Fan-shaped, clear to slightly dusky.

Distinctive fins

Pelvic fins are pointed and often dusky. Anal fin has 7-9 spines and 6-8 soft rays, similar in shape to the soft-rayed portion of the dorsal fin.

Identification Tips

1. 1

   Body Pattern

   Look for the characteristic 8-9 distinct black vertical bars on a greyish body. This is the most reliable visual identifier.

2. 2

   Sexual Dimorphism

   Observe size and shape: males are larger, more elongated, and may develop a nuchal hump. Females are smaller, rounder, and often have orange/gold patches on their dorsal fin or flanks, especially when mature and breeding.

3. 3

   Fin Shape

   Males typically have more pointed dorsal and anal fins compared to the rounder fins of females.

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