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Portola was in the national media spotlight in 1996–1997 when a conflict occurred between the local community and the Department of Fish and Game over how to deal with an invasive species of northern pike in Lake Davis. The lake was chemically treated in 1997 to eradicate the fish, but they reappeared in 1999. In early September 2007, the California Department of Fish and Game eradicated the pike using CFT Legumine, a new liquid formulation of rotenone.