Tropical freshwater fish from the Aravanidae family of the Aravanidae order. Body length up to 90 cm, rarely up to 120 cm. Weight up to 6 kg, on average 4.6 kg. The ribbon-like body is very strongly flattened on the sides, covered with very large light scales with a strong silvery sheen with a golden tint young arawans have yellow-orange stripes and a blue sheen. The dorsal and anal fins are very long and narrow, almost merging with the caudal fin.