Posted By ryfish on 22 Sep 2010 06:16 PM
they are both saltwater
Neither is a salt water species:http://www.nanfa.org/fif/eamericanus.shtml
"wikipedia" isn't perfect but:
The redfin and grass pickerels occur primarily in sluggish, vegetated waters of pools, lakes, and swamps, and are carnivorous, feeding on smaller fish. Larger fishes, such as the striped bass (Morone saxatilis), bowfin (Amia calva), and gray weakfish (Cynoscion regalis), in turn, prey on the pickerels when they venture into larger rivers or estuaries.