How to Identify Espei Rasbora

To identify Espei Rasbora (Trigonostigma Espei), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

The body is generally an iridescent orange to coppery-red, sometimes with a pinkish hue. A prominent black, wedge-shaped marking extends from the mid-body towards the caudal peduncle, tapering to a point. The fins are typically translucent, sometimes with a reddish tint, especially the caudal fin.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Small size, typically reaching 1.0-1.2 inches (2.5-3.0 cm) in standard length, with a maximum of 1.4 inches (3.5 cm)., Distinctive black, wedge-shaped marking on the flanks, which is more elongated and pointed than in T. heteromorpha., Iridescent orange to coppery-red body coloration.

Dorsal fin

Single, relatively small, located mid-body.

Tail fin

Forked, translucent, sometimes with a reddish tint.

Pectoral fin

Small, clear, positioned ventrally.

Distinctive fins

All fins are generally translucent, blending with the body color, though some individuals may show a slight reddish hue, particularly in the caudal fin.

Identification Tips

1. 1

   Black Mark Shape

   The black marking on T. espei is distinctly wedge-shaped, starting broadly near the dorsal fin and tapering to a point towards the caudal fin. It is more elongated and less triangular than the marking on T. heteromorpha.

2. 2

   Body Coloration

   T. espei typically exhibits a more vibrant orange to coppery-red body color compared to the often pinkish or less intense coloration of T. hengeli, and the generally deeper orange/red of T. heteromorpha.

3. 3

   Size

   Generally smaller than T. heteromorpha, reaching a maximum of about 3.5 cm (1.4 inches), whereas T. heteromorpha can reach up to 4.5 cm (1.8 inches).

4. 4

   Habitat Preference (Wild)

   While all Trigonostigma species prefer similar habitats, T. espei is often found in slightly more acidic and tannin-stained waters within its specific geographic range.

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