Tinfoil Barb

Geographic Origin and Biotope: Southeast Asia (Thailand, Malaysia, Sumatra, Borneo). Prefers large rivers and basins. It is a migratory species that regularly enters flooded forests during the rainy season to feed and spawn.

Taxonomy and Morphology: Tinfoil Barb (Barbonymus schwanenfeldii). A "giant" of the cyprinid family. Strongly discoidal body profile (compressed and high) like a "pancake", huge and reflective scales that look like a sheet of aluminum foil (Tinfoil) and a small but ravenous mouth.

Social Behavior: Constantly active, hyperkinetic and strictly gregarious. Mandatory requires a school of 5-6 individuals. They are harmless fish towards species too big to be swallowed, but they sow chaos in the tank due to their swimming clumsiness.

Coloration and Sexual Dimorphism: Dazzling silvery-metallic scales that catch the light. The large fins (especially dorsal, caudal and anal) are fiery red, sharply edged with black along the outer border. Sexing juveniles is impossible; adult females are noticeably rounder.

Aquarium Setup: Monumental purchase mistake for novices. Requires an aquarium of minimum 200 cm / 80 inches (over 800 liters / 200 gallons) with immense open spaces to swim freely and highly resistant shatterproof lids (sudden jumps break light glass).

Diet and Feeding: Omnivorous "lawnmower". Will insatiably devour ANY real plant placed in the tank (including Anubias and Microsorum). Must be fed with enormous quantities of flakes and vegetable pellets (spirulina), blanched spinach, zucchini and occasional meaty food.

Water Quality: Incredibly resistant and adaptable, but the industrial amount of waste produced by the school requires multiple oversized external filters and gargantuan water changes. Always maintain oxygenation at maximal levels.

Compatibility and Tankmates: Excellent dither fish (reassuring fish) for huge "Monster Tanks". Perfect companion for Astronotus (Oscar), massive Central American Cichlids, large Datnioides and large Loricariids. Small fish, like Tetras, will be swallowed.

Aquarium Reproduction: Impossible in home aquariums due to the need to make hormonal migrations in boundless spaces. In Southeast Asia they are reproduced by the ton in outdoor basins as a primary food source and, secondarily, for ornamental purposes.

Risks and Diseases: Fraudulently sold at 4 cm (1.5 inches) unaware of the final size (35 cm / 14 inches). In 100-liter (25-gallon) tanks it dies before 6 months from induced dwarfism, often smashing its snout bleeding against the glass during nocturnal panic attacks or lighting changes.