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Chicago harbor search yields no snakeheads

CHICAGO (AP) — A search Tuesday of a Chicago harbor turned up no more northern snakeheads, a voracious alien fish that can devastate freshwater ecosystems by gobbling up food and native fish.

"This is a good sign that we didn't catch any," said Philip Willink, a fish biologist with Chicago's Field Museum who checked six traps and nets in Burnham Harbor.

An angler caught an 18-inch northern snakehead in the harbor about 10 days ago, raising fears the species might spread into Lake Michigan.