Introduced in the 1900s, reintroduced by 2000. The common and Chinese carps were introduced during the early history of Singapore. They formed the basis for an important aquaculture after 1945, but rising land values have now rendered this activity uneconomic and it has declined considerably in recent years probably due to predation on juveniles by Parachromis managuensis (Ref. 52035). Also Ref. 1739, 108093.