贝泽曼半线脂鲤 · Boesman's Tetra

Overview

Hemigrammus boesemani is a rarely traded, peaceful small tetra. A quiet group aquarium suits it better than a competitive community. Questions surrounding its range make reliable locality and identification information especially useful.

Distribution & habitat

Published records concern Suriname, French Guiana, and Peru. That discontinuous range may reflect mistaken identifications or additional populations not yet recorded. It favors still or sluggish water, including calm portions of rivers and tributaries.

Aquarium setup

Use sand, roots, wood, and some leaves to create subdued, lightly tannin-stained surroundings. Remove deteriorating leaf material before it fouls the water. A stable, densely planted aquarium is another option. Fish offered for sale are likely wild-caught, so an exposed, hectic community is an unsuitable default.

Diet & feeding

This omnivore generally accepts flakes and granules. Combine them with small live and frozen foods for variety.

Behaviour & compatibility

Keep a minimum of six, preferably ten or more. Gentle tetras, pencilfishes, dwarf cichlids, cory-type catfishes, and small loricariids are suitable possibilities. Some smaller rasboras can also work under matching conditions. Avoid boisterous or much larger companions that could outcompete it.

Sexual dimorphism

The swim bladder, visible through the translucent body, reportedly ends in a point in males and a rounded outline in females. Treat this as a reported identification clue rather than an infallible test.

Breeding

Prepare a dim aquarium with soft acidic water, fine plants or spawning mops, and gentle sponge filtration. Mesh can protect eggs from adults. Group spawning is possible, or a conditioned pair can be selected after separating the sexes. Evening introduction often leads to spawning the following morning.

Remove adults when eggs are visible. Hatching takes about twenty-four to thirty-six hours; independent swimming follows another three or four days later. Feed infusoria first, then microworms or newly hatched brine shrimp. Keep eggs and early fry in very low light because they are light-sensitive.

Notes

The fish was previously treated as a subspecies of a close relative. Preserve reliable identification and origin information without assuming that historical names resolve every specimen's identity.