How to Identify Macmaster's Dwarf Cichlid

To identify Macmaster's Dwarf Cichlid (Apistogramma macmasteri), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Males are highly variable and vibrant, typically exhibiting a yellow to orange body with iridescent blue or green scales, particularly on the flanks and fins. A prominent black lateral stripe or series of spots is often present. The operculum (gill cover) often displays red or orange markings, giving rise to the 'red-shouldered' common name. Dorsal and caudal fins are often edged in red, orange, or blue. Females are generally yellowish-brown with a distinct black lateral spot and often a black spot on the caudal peduncle. During breeding, females intensify their yellow coloration and the black markings become more pronounced.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Sexual dimorphism: Males are larger and much more colorful than females., Prominent black lateral spot or stripe., Red/orange coloration on the operculum and fin edges in males., Pointed dorsal and anal fins in mature males.

Dorsal fin

Long, extending almost the entire length of the back, with anterior rays often elongated in mature males. Typically has 15-17 spines and 6-8 soft rays.

Tail fin

Rounded to lyre-shaped in males, rounded in females. Often with iridescent spots or streaks.

Pectoral fin

Small and clear, typical of cichlids.

Distinctive fins

Pelvic fins are often elongated and filamentous in males, sometimes with a reddish or bluish tint.

Identification Tips

1. 1

   Size and Shape

   Males reach up to 7 cm (2.8 inches) total length, while females are smaller, typically up to 5 cm (2 inches). They have a moderately compressed, elongated body shape typical of Apistogramma species.

2. 2

   Coloration (Males)

   Look for the vibrant yellow/orange body, iridescent blue/green scales, and distinct red/orange markings on the operculum and fin edges. The caudal fin is often lyre-shaped with colorful patterns.

3. 3

   Coloration (Females)

   Females are generally duller, yellowish-brown, but will display a bright yellow body with prominent black markings (lateral spot, caudal peduncle spot) when breeding or guarding fry.

4. 4

   Fin Morphology

   Mature males often have elongated dorsal and pelvic fins, and a lyre-shaped caudal fin. Females have more rounded fins.

5. 5

   Geographic Origin

   Knowing the collection locality can help differentiate it from similar species, as Apistogramma species often have restricted ranges.

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