The U.S. Army Corps of Engineers is considering alternatives for keeping Asian carp out of a marsh near Fort Wayne.
Eagle Marsh has been identified as one way the invasive fish might reach the Great Lakes.
Asian carp have infested the Mississippi and Illinois rivers and are approaching a Chicago-area shipping canal through which they might reach Lake Michigan. The Corps has promised to produce options for blocking their passage by the end of next year.
Scientists say the ravenous fish could out-compete native species for food.
The Corps has issued a report comparing nine alternatives for blocking the carp's access through Eagle Marsh.
The Corps will hold a public meeting on the alternatives on Dec. 4 at the Allen County Main Public Library in Fort Wayne.