The genus Scleropages consists of three species:
Scleropages formosus
Scleropages jardini
Scleropages leichardti
Similar in body shape of the head as Osteoglossum, but with a shorter, deeper dorsal fin are the three species of Scleropages. They may attain 90 cm in length, the females are mouth brooders. The number of scales in the lateral line is 32-35 in S. leichardti and S. jardini while S. formosus has only 21-25. They are greenish-grey to brown on the back and coppery-gold (S. jardini) or silvery-green (S. leichardti) on the flanks. S. leichardti has one or two orange-red spots on each scale, while S. jardini appears to lack body spots, having moon shaped edges to its scales instead. The fins are similar to, or darker than its body colour. Both species have spots present on their fins and tail, with S. leichardti having numerous small spots in lines and S. jardini having less but larger spots. The spots may be yellow to orange to red depending on the individual fish. The more northern species (S. jardini ) commonly shows a pattern of lines and or dots on and bordering its gill plate, this is absent in the more southern species (S. leichardti ).
- Scleropages formosus 2 (Schlegel and Müller, 1829) lives in Thailand, Mekong basin, Malaysia, Borneo, Sumatra.
- Scleropages jardini (Saville-Kent, 1892) in the northern rivers of Australia, Papua and West-Irian.
- Scleropages leichardti Günther, 1864 is restricted to the Fitzroy river-system, eastern Australia, just below the tropic of Capricorn.