Scleropages is a genus of large, elongate bonytongue fish (family Osteoglossidae) found across freshwater systems of Southeast Asia and the Australia-New Guinea region - the atlas lists Australia, Indonesia, Myanmar, Cambodia, Malaysia, Papua New Guinea, and Thailand. The body is long and laterally compressed with an upturned mouth and large, mirror-bright scales; Scleropages are surface-oriented ambush predators well known for leaping clear of the water to take insects and small prey overhanging the surface. Atlas species run 23.5–39.5 in, among the largest fish kept in home aquaria anywhere in the hobby.
The Asian arowana (S. formosus) is one of the most culturally and commercially significant ornamental fish in the world, especially prized across Asia for vivid color forms - red, golden, and others - and long regarded as a symbol of luck and prosperity; overharvesting collapsed wild populations, and the species is now farmed under strict regulation, with captive-bred individuals commonly microchipped to document legal origin. The Australian species, S. jardinii (Gulf saratoga) and S. leichardti (southern saratoga), are less commercially prized but do appear among large-tank specialists. Conservation across the genus reflects that split history: the atlas records one Endangered, one Near Threatened, and one Data Deficient status alongside a single Least Concern species.