Scleropages

Scleropages is a genus of freshwater fish belonging to the family Osteoglossidae, commonly known as arowanas. There are currently two recognized species within this genus, both endemic to Australia. Scleropages formosus, the Asian arowana, is sometimes included but is now classified in the genus Scleropages. The genus is characterized by its elongated body, large scales, and a distinctive upturned mouth. They are predatory fish, feeding on insects, crustaceans, and smaller fish.

Scleropages leichardti, known as the Gulf Saratoga or Saratoga, is found in freshwater rivers and billabongs of Queensland. It is typically bronze or silver in color with large, dark-edged scales. Scleropages jardinii, the Northern Saratoga, inhabits freshwater systems across northern Australia, including Queensland, the Northern Territory, and Western Australia. This species often exhibits more iridescent scales and can grow larger than Scleropages leichardti. Both species are popular in the aquarium trade, although their collection and trade are regulated due to conservation concerns. They are mouthbrooders, with the male carrying the eggs and newly hatched fry in his mouth for protection.