Hemigrammus Bleheri

Datasheet

General Description

The Hemigrammus Bleheri, commonly known as the Firehead Tetra, is a peaceful species commonly mistaken for the "rummy-nose tetra." It closely resembles other species within its genus and is selectively bred in a "golden" variant by commercial breeders. The distinguishing features include red coloration extending beyond the gill covers, specific markings on the caudal peduncle, and variations in lateral line extensions. Taxonomically, this species falls under the Characidae family and is typically found in blackwater rivers and tributaries. It reaches a maximum size of 5.0cm.

Aquarium Setup

For a biotope setup, utilize river sand substrate, driftwood branches, twisted roots, and dried leaves to mimic natural habitat conditions. Aquatic plants are not necessary. Maintaining a tea-colored water with the aid of peat in the filter and dim lighting enhances the fish's vibrancy. Alternatively, a well-planted tank with regular water changes is suitable if aiming for optimal color development. Water conditions should be maintained within a pH range of 5.5-7.0, a temperature of 23-26°C, and a hardness of 2-15°dH (see table).

Behaviour

The Firehead Tetra is a peaceful species that thrives best when kept in groups of at least 10 individuals. It does not fare well with aggressive tankmates and is most compatible with South American species like Hemigrammus and Hyphessobrycon, among others. Maintaining them in larger numbers enhances their shoaling behavior, resulting in a visually striking display.

Feeding and Diet

Being omnivorous, the Firehead Tetra accepts a varied diet comprising dried flakes, granules, small live, and frozen foods. Food size should correspond with their small mouths for optimal intake. Offering a diverse diet enhances color development in these fish.

Reproduction & Dimorphism

To breed Firehead Tetras, a separate tank with dim lighting and suitable spawning areas is needed. Eggs are adhesive and require specific conditions for successful hatching. Females display a rounder body shape when mature, allowing for easy sexual dimorphism. The fry, sensitive to light initially, require specialized feeding until they can accept larger foods.

Habitat and Distribution

These tetras are native to the Rio Meta and Rio Negro in Colombia and Brazil, inhabiting blackwater rivers with acidic, tannin-stained waters. Their natural habitat features slow-flowing waters with decaying organic material, providing a suitable environment for their specific requirements.