How to Identify Glass Bloodfin Tetra

To identify Glass Bloodfin Tetra (Prionobrama filigera), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is largely transparent or translucent, with a silvery sheen. The most striking feature is the bright red coloration on the caudal fin, and often on the dorsal, anal, and pectoral fins as well. A faint, iridescent lateral line may be present. Males tend to exhibit more intense fin coloration, especially during breeding.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Transparent body allowing visibility of internal organs, Bright red caudal fin, Elongated, slender body shape

Dorsal fin

Single, relatively small dorsal fin located mid-body, often with a reddish tint.

Tail fin

Deeply forked caudal fin, prominently colored bright red, which is the most distinguishing feature.

Pectoral fin

Small, clear to slightly reddish pectoral fins.

Distinctive fins

The adipose fin is present, typical of characins, and is usually clear or faintly colored. The anal fin is relatively long, extending from behind the pelvic fins to the caudal peduncle, and can also show reddish hues.

Identification Tips

1. 1

   Body Transparency

   The most immediate identifier is the almost completely transparent body, through which the spine and some internal organs are visible.

2. 2

   Caudal Fin Coloration

   The bright, often intense, red coloration of the caudal fin is a key distinguishing characteristic.

3. 3

   Body Shape

   Its slender, elongated body helps differentiate it from more robust or deeper-bodied tetras.

4. 4

   Schooling Behavior

   Observing its schooling behavior in groups can also aid in identification, as it's a characteristic trait.

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