Quoting from the page lipi.go.id., Head of the Research Center of the Indonesian Institute of Sciences, Dr. Siti Nuramaliati Prijono said that in the 1910-2009 period, the rate of loss of native species was 67 percent of crustaceans, 66 percent of mollusks, and 92 percent of fish in the watershed. Ciliwung River (DAS). One of the extinct species is the type of large catfish like African catfish.