A: #1 Rob:
Check out these links,
http://www.myfwc.com/RULESANDREGS/Freshwater_FishRules_index
http://www.myfwc.com/About/Regions/About_Region_RegMap.htm
In summary:
Nongame fish (which include blue tilapia) may be taken by the use of cast nets in the South and Northeast regions, in Citrus County, and in the Southwest Region, except that possession or use of cast nets in waters adjoining Saddle Creek Fish Management Area, Polk County, confined by Morgan Combee Road, U.S. Highway 92 and Fish Hatchery Road are prohibited.
Blue Tilapia are prohibited, without a permit, in the Northwest and North Central regions.
Good Luck and Good Fishing...
Bob Wattendorf
Marketing and Special Projects Coordinator/WebMaster
Freshwater Fisheries Management
620 South Meridian St.
Tallahassee, FL 32399-1600
Phone: 850/488-0520 x 17245
Fax: 850/413-0381
Mobile: 850/528-1060
Website: MyFWC.com/Fishing
E-Mail: Bob.Wattendorf@MyFWC.com