Amazon Brycon

Brycon cephalus is one of the most commercially significant freshwater fish in Brazil, widely farmed for food and representing a keystone species in the Amazon ichthyofauna. It is a large, open-water characin with a notably broad head and powerful build, reaching up to 40 cm in healthy adults. In the wild it is an omnivore consuming seeds, fruits, invertebrates, and small vertebrates during seasonal flood pulses in the Amazon floodplain.

In captivity, Brycon cephalus requires very large aquariums — 1500 litres minimum — with powerful filtration and strong oxygenation. It is an exceptionally active, fast-swimming species that needs extensive horizontal space and a very secure lid to prevent jumping. Water should be soft to moderately hard and warm. Tankmates must be large enough not to be viewed as prey.

While not commonly available through the ornamental fish trade, Brycon cephalus occasionally surfaces through specialist importers as a display species. Its broad, impressive head, bold silver flanks, and energetic character make it a compelling specimen for very large specialist aquariums. A varied omnivore diet of pellets, fruit, vegetables, and meaty supplements keeps it in peak condition.

Water: Soft to moderately hard, pH 5.5–7.5, 24–28°C; high oxygenation and strong filtration essential. Tank: 1500 L minimum; open water; very secure lid; no fragile décor. Feeding: Omnivore — large sinking pellets, fresh fruit, vegetables, prawns, feeder fish. Breeding: Migratory spawner; not feasible in home aquaria. Compatibility: Semi-aggressive; best with very large robust species or as solo display.