Meg Pickel releases baby fish. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

A passerby release a baby fish. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Craig Coit releases a baby fish. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Donna Rose Gilcrease with the Chicago Park District keeps a container containing fish aerated. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Donna Rose Gilcrease with the Chicago Park District holds a baby fish before it's release. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Robert Long with the Chicago Park District holds a baby fish between his lips before releasing into the river. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Dana Murphy loses her grip on a fish while Donna Rose Gilcrease, with the Chicago Park District, watches. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Donna Rose Gilcrease, with the Chicago Park District, helps Meg Pickel put baby fish into her palms. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Donna Rose Gilcrease, with the Chicago Park District, helps Alan Kong and Corinna Jess put baby fish into their palms. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times

Donna Rose Gilcrease with the Chicago Park District holds a baby fish before it's release. Friends of the Chicago River release hundreds of baby bluegill fish into the Chicago River below the Michigan Avenue bridge on Friday, May 11, 2012 in Chicago. | Richard A. Chapman~Sun-Times