Oryzias sinensis Chen, Uwa & Chu, 1989
Oryzias sinensis
photo by Parenti, L.R.

Family:  Adrianichthyidae (Ricefishes), subfamily: Oryziinae
Max. size:  3.1 cm SL (male/unsexed); max. reported age: 1 years
Environment:  benthopelagic; freshwater
Distribution:  Asia: Mekong, Irrawaddy, Salween, Red River and Nanpangjiang basins (Ref. 43281). Introduced in Kazakhstan where it is now abundant; established in lower Kuban drainage; spreading in Azov basin, discovered in River Obitochnaya, Ukraine in 2003 (Ref. 59043).
Diagnosis:  Anal soft rays: 18-20
Biology:  Adults occur in swamps, marshes, rice fields, backwaters, stream stretches with stagnant water and dense vegetation (Ref. 59043). In Fuxian Lake, China, they are found in upper and middle layers of shallow coastal waters (Ref. 26717). Adults feed mainly on filamentous algae and zooplankton (Ref. 26717). They mature in 3 months time. Spawning occurs between April and September when temperature rises above 26°C. Can tolerate temperatures from 0 to 42°C, surviving winter under ice (Ref. 59043).
IUCN Red List Status: Least Concern (LC); Date assessed: 21 February 2011 Ref. (130435)
Threat to humans:  harmless


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