Oryzias is a genus of ricefishes native to fresh and brackish water in east and south Asia.[4] Some species are widespread and the Japanese rice fish (O. latipes) is commonly used in science as a model organism, while others have very small ranges and are threatened.[4] They are small, up to 8 cm (3.1 in) long, and most are relatively plain in colour.[5]
They have an unusual reproductive behavior where the female facultatively (optionally) carries the eggs in a cluster at the pelvic or anal fins for a period after they have been fertilized.[4][6]
^ abHerder, F.; Hadiaty, R. K.; Nolte, A. W. (2012). "Pelvic-fin brooding in a new species of riverine ricefish (Atherinomorpha: Beloniformes: Adrianichthyidae) from Tana Toraja, Central Sulawesi, Indonesia". The Raffles Bulletin of Zoology. 60 (2): 467–476.
^ abParenti, L.R.; Hadiaty, R.K.; Lumbantobing, D.; Herder, F. (2013). "Two New Ricefishes of the Genus Oryzias (Atherinomorpha: Beloniformes: Adrianichthyidae) Augment the Endemic Freshwater Fish Fauna of Southeastern Sulawesi, Indonesia". Copeia. 2013 (3): 403–414. doi:10.1643/ci-12-114.
^Mandagi, I.F.; Mokodongan, D.F.; Tanaka, R.; Yamahira, K. (2018). "A New Riverine Ricefish of the Genus Oryzias (Beloniformes, Adrianichthyidae) from Malili, Central Sulawesi, Indonesia". Copeia. 2018 (106): 297–304. doi:10.1643/CI-17-704.
^Gani, A.; Suhendra, S.; Herder, F.; Schwarzer, J.; Möhring, J.; Montenegro, J.; Herjayanto, M.; Mokodongan, D. F. (2022). "A New Endemic Species of Pelvic-brooding Ricefish (Beloniformes: Adrianichthyidae: Oryzias) from Lake Kalimpa'a, Sulawesi, Indonesia". Bonn Zoological Bulletin. 71 (1): 77–85. doi:10.20363/bzb-2022.71.1.077.
^Utama, I.V.; Mandagi, I.F.; Lawelle, S.A.; Masengi, K.W.A.; Watanabe, K.; Sawada, N.; Nagano, A.J.; Kusumi, J.; Yamahira, K. (2022). "Deeply divergent freshwater fish species within a single river system in central Sulawesi". Molecular Phylogenetics and Evolution. 173 (107519): 1–11.
^Kobayashi, H.; Mokodongan, D.F.; Horoiwa, M.; Fujimoto, S.; Tanaka, R.; Masengi, K.W.A.; Yamahira, K. (2023). "A New lacustrine Ricefish from central Sulawesi, with A Redescription of Oryzias marmoratus (Teleostei: Adrianichthyidae)". Ichthyological Research. 70: 490–514. doi:10.1007/s10228-023-00908-2.
^Uwa, H. & Magtoon, W. (1986). "Description and karyotype of a new ricefish, Oryzias mekongensis, from Thailand". Copeia. 51: 473–478. doi:10.2307/1445005. JSTOR1445005.
^Utama, I.V.; Mokodongan, D.F.; Lawelle, S.A.; Masengi, K.W.A.; Yamahira, K. (2024). "A new ricefish, Oryzias moramoensis (Adrianichthyidae), described from a mountain waterfall in Southeast Sulawesi, Indonesia". Ichthyological Research: 490–514. doi:10.1007/s10228-024-00981-1.
^Möhring, J.; Mokodongan, D.F.; Gani, A.; Wowor, D.; Annawaty; Böhne, A.; Herder, F. (2025). "A New and Unique Species of Ricefish (Teleostei: Adrianichthyidae: Oryzias) from the Lariang River Basin, Sulawesi, Indonesia, and the First Known Sympatric Ricefish Species Pair from Sulawesi Rivers". Ichthyology & Herpetology. 113 (1): 61–74.
^Mokodongan, D.F.; Tanaka, R.; Yamahira, K. (2014). "A New Ricefish of the Genus Oryzias (Beloniformes, Adrianichthyidae) from Lake Tiu, Central Sulawesi, Indonesia". Copeia. 2014 (3): 561–567. doi:10.1643/ci-13-081.