Bengal Loach / Queen Loach

Geographic Origin and Biotope: Native to the Brahmaputra River basin in India and Bangladesh. Inhabits slow to moderate flowing streams, often muddy or with sandy/gravelly bottoms rich in organic debris and hiding places among the rocks.

Taxonomy and Morphology: Bengal Loach (Botia dario). Recognizable by the elegant 7-8 dark vertical stripes that encircle the golden-yellow body, which thin out and fragment with age. Possesses developed barbels and the typical bony spine under the eye (used for defense).

Social Behavior: Highly gregarious species. Must absolutely be kept in groups of 5-6 or more individuals to allow the development of a complex social hierarchy and mitigate shyness. If isolated, it becomes apathetic or aggressive towards other species.

Coloration and Sexual Dimorphism: The dark bands on a golden background vary enormously based on the fish's mood. Adult females appear visibly rounder and higher on the back than males, especially during the pre-reproductive period.

Aquarium Setup: Tank of minimum 120 cm (48 inches). A fine sand substrate is mandatory so as not to wear out the delicate rooting barbels. It is essential to provide countless narrow hiding places (woods, pipes, broken pots) where the fish love to pile up together.

Diet and Feeding: Omnivore with a carnivorous tendency. Exceptional hunter of small pest snails. Requires a varied diet: high-quality bottom tablets, bloodworms, tubifex and vegetable supplements (slices of raw zucchini or blanched peas).

Water Quality: Tolerates cooler temperatures well compared to other Botias (23-26°C / 73-79°F), but the water must be extremely clean and well oxygenated. Sensitive to high nitrates and organic pollution of the substrate.

Compatibility and Tankmates: More peaceful than other large Botias, but very lively. Perfect with medium-sized Asian Cyprinids (Puntius, schooling Rasboras) and Cichlids with a calm temperament. Avoid cohabitation with small Corydoras that would be stressed or deprived of food.

Aquarium Reproduction: Extremely rare in domestic captivity, almost non-existent. In nature, reproduction is linked to complex seasonal migrations and extreme variations of the river ecosystem that cannot be replicated in a tank.

Risks and Diseases: Like all scaleless loaches, it is extremely vulnerable to Ich (White Spot Disease). Pay the utmost attention when using medicines containing copper or malachite, which are toxic and lethal if not dosed at half strength.