How to Identify Rummy-nose Tetra

To identify Rummy-nose Tetra (Hemigrammus rhodostomus), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

The body is generally silvery-white to translucent, sometimes with a faint greenish or yellowish tint. The most striking feature is the intense red coloration on the snout and anterior part of the head, extending to just behind the eyes. The caudal fin has a distinctive black and white pattern, typically three horizontal black bands separated by two white bands. The dorsal, anal, and pectoral fins are usually hyaline (clear).

Scale type

cycloid

Mouth position

terminal

Distinctive features

Bright red coloration on the snout and head, Black and white striped caudal fin (tail fin), Streamlined, torpedo-shaped body, Small adipose fin present

Dorsal fin

Small, typically with 10-11 rays, located mid-body.

Tail fin

Forked, with a prominent black and white striped pattern (three black bands, two white bands).

Pectoral fin

Small and clear, positioned ventrally.

Distinctive fins

Presence of a small, fleshy adipose fin between the dorsal and caudal fins, characteristic of characins.

Identification Tips

1. 1

   Head Coloration

   Look for the vibrant, intense red coloration on the snout and head, which is the most defining characteristic. This red can fade if the fish is stressed or unhealthy.

2. 2

   Caudal Fin Pattern

   Observe the caudal (tail) fin for its distinct black and white striped pattern. This pattern is consistent and a key identifier.

3. 3

   Body Shape and Size

   Note the torpedo-shaped, slender body, typically growing up to 4.5-5 cm (1.8-2 inches) in total length.

4. 4

   Schooling Behavior

   In an aquarium setting, their tight schooling behavior is a good indicator, especially when combined with their physical traits.

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