Oryzias marmoratus

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Oryzias marmoratus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Beloniformes
Family: Adrianichthyidae
Genus: Oryzias
Species: O. marmoratus
Binomial name
Oryzias marmoratus
(Aurich, 1935)

Oryzias marmoratus, also known as the marmorated ricefish or marmorated medaka, is a species of fish in the Adrianichthyidae family,[1] from Lake Towuti, Lake Mahalona, Lake Lontoa and associated streams in Sulawesi, Indonesia.[2]


Oryzias marmoratus is endemic to Indonesia.[3] They are a vulnerable species.[2] This species is found in freshwater within a benthopelagic range. It is native to tropical climates. They are considered to be a species that does not migrate. The maximum length of the species is about 4.1 cm (1.6 in). The males are of a grayish-brown color on the head with darker brown splotches on the body.[4] This species is a non-annual breeder. It can be kept as an aquarium species, but it is known to be very difficult to do so. Humans use them for the commercial aquarium trade.[5]


  1. ^ "Marmorated ricefish (Oryzias marmoratus)". ARKive. Retrieved 15 March 2013. 
  2. ^ a b "Oryzias marmoratus". International Union for Conservation of Nature and Natural Resources. Retrieved 15 March 2013. 
  3. ^ "Oryzias marmoratus". iNaturalist. Retrieved 15 March 2013. 
  4. ^ "Oryzias marmoratus (Aurich, 1935) Marmorated medaka". Fish Base. Retrieved 15 March 2013. 
  5. ^ "Oryzias marmoratus — Overview Marmorated Ricefish". Encyclopedia of Life. Retrieved 15 March 2013.