How to Identify Disk Tetra

To identify Disk Tetra (Myloplus schomburgkii), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery body with a prominent, broad, vertical black band extending from the dorsal fin to the anal fin, often more intense in juveniles and stressed individuals. Fins can be hyaline to reddish, especially the anal and caudal fins. Some individuals may exhibit a reddish tint on the belly or operculum. The intensity of the black band can vary significantly among individuals and populations.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Deep, laterally compressed body, Large, prominent eyes, Strong, molariform teeth adapted for crushing plant matter, Adipose fin present, Prominent vertical black band on flanks

Dorsal fin

Single, relatively short-based dorsal fin, typically with 10-12 soft rays. Originates anterior to the anal fin.

Tail fin

Forked caudal fin, often with reddish hues.

Pectoral fin

Well-developed pectoral fins, typically hyaline.

Distinctive fins

Anal fin is long-based, often with a reddish coloration, and typically has 25-30 soft rays. The adipose fin is small but present.

Identification Tips

1. 1

   Body Shape

   Look for a very deep, disc-shaped, and laterally compressed body, characteristic of many Myloplus species.

2. 2

   Black Band

   The most distinguishing feature is the broad, vertical black band on the mid-flank. This band is usually very clear and extends from the dorsal to the anal fin base. Note that its intensity can vary.

3. 3

   Dentition

   If possible to observe (e.g., in dead specimens or very close observation), the molariform teeth are indicative of its herbivorous diet and differentiate it from piranhas.

4. 4

   Fin Coloration

   Observe the fins, particularly the anal and caudal fins, which often have a reddish tint, especially in mature individuals.

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