Silver Arowana

The Silver Arowana is a large freshwater fish in the family Osteoglossidae, an ancient bony-tongued fish lineage dating back tens of millions of years. Native to the Amazon River basin in South America, it inhabits slow-moving rivers, tributaries, and seasonally flooded forest habitats. Its elongated body, upturned mouth, and long trailing dorsal and anal fins make it one of the most recognizable freshwater fish in the region. The species is also widely kept and bred in the aquarium trade worldwide because of its striking metallic appearance and active surface behavior, making it one of the best-known members of the arowana family globally.

Identify a Silver Arowana by these traits:

• Body shape: long, ribbon-like, and laterally compressed with a nearly straight back profile
• Scales: large, metallic silver, often with a faint blue-green sheen
• Mouth: strongly upturned, angled almost vertically, with two fleshy barbels on the lower jaw
• Fins: elongated dorsal and anal fins set far back near the tail, giving a wing-like appearance when swimming
• Size: adults commonly reach 60-90 cm, occasionally larger

Its upturned mouth and paired chin barbels distinguish it from similarly elongated fish such as gars, which have a pointed snout instead.

Silver Arowana are native to the Amazon basin, including the main river channel, blackwater tributaries, and seasonally inundated floodplain forests across Brazil, Peru, Colombia, Ecuador, and neighboring countries. They favor slow-flowing, warm tropical water with abundant surface cover from overhanging vegetation and flooded trees, especially during high-water seasons when they move into flooded forest to feed. Water temperatures in their native range typically stay between 24 and 30 degrees Celsius. Their upward-facing mouth reflects a lifestyle centered near the water surface, where they intercept prey rather than foraging along the riverbed.

Silver Arowana are active, solitary predators known for a distinctive hunting behavior: they can leap over a meter out of the water to strike insects, small birds, or bats resting on overhanging branches. They cruise near the surface, using keen eyesight to detect movement above the waterline before launching an explosive strike. Adults establish loose home ranges and show limited schooling behavior, becoming more solitary and territorial with age. Silver Arowana are mouthbrooders, with the male carrying fertilized eggs and newly hatched young in his mouth for protection until the offspring can fend for themselves.