How to Identify Blue Tetra

To identify Blue Tetra (Boehlkea fredcochui), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is predominantly an iridescent blue, often with a silvery-white belly. Males typically exhibit more intense blue coloration, especially during breeding. A faint dark lateral line may be present. Fins are generally hyaline (clear) or slightly tinted with blue.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Iridescent blue body coloration, Small size, typically reaching 4-5 cm (1.6-2 inches) in total length, Forked caudal fin

Dorsal fin

Single dorsal fin, relatively short, located mid-body.

Tail fin

Deeply forked caudal fin.

Pectoral fin

Paired pectoral fins, clear and small.

Distinctive fins

Adipose fin present, characteristic of characins.

Identification Tips

1. 1

   Coloration

   The vibrant iridescent blue body is the most distinguishing feature, especially under good lighting.

2. 2

   Size and Shape

   Small, laterally compressed body, typical of many tetra species, but with a more pronounced blue hue.

3. 3

   Adipose Fin

   Presence of a small, fleshy adipose fin between the dorsal and caudal fins confirms its characin identity.

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