Mike :

Not green sunfish. Just regular bluegill (BG). CNBG are a deep south/fla. strain of BG and do not reach their potential in colder climates. Look at these 2 links :

http://www.cnr.vt.edu/efish/families/bluegill.html

http://www.cnr.vt.edu/efish/families/greensun.html

Here are most of the lepomis/sunfish :

http://www.cnr.vt.edu/efish/families/centrarchidae.html