If you don't have a license, get one: Link to FWC

Licensing requirements follow the species of fish you are fishing for, regardless of where you are fishing. For example, anglers fishing for and possessing largemouth bass in brackish water need a freshwater license; anglers fishing for saltwater species in fresh water (e.g., spotted seatrout, red drum, snook, or American shad) need a saltwater license to possess these species. 

Resident:
For the purpose of fishing in Florida, a person is a resident if he or she has lived in Florida for six continuous months prior to applying for licenses and claims Florida as his or her primary residence. Active military personnel stationed in Florida, including their spouses and dependent children residing in the household, are considered residents when purchasing fishing licenses.

Resident 12-Month Freshwater Fishing
(Valid for 12 months from specified beginning date) ...$17.00

Resident Freshwater Fishing/Hunting Combination (Valid 12 months from specified beginning date...$32.50

Resident Freshwater/Saltwater Combination (Valid 12 months from specified beginning date)...$32.50

Resident Freshwater/Saltwater/Hunting Combination (Valid 12 months from specified beginning date)...$48.00

64 or Older Fishing/Hunting (Includes Freshwater Fishing and Hunting licenses; and Wildlife Management Area, Archery, Crossbow, Muzzleloading Gun, Turkey and Florida Waterfowl permits)...$13.50

Sportsman's License: (Includes Freshwater Fishing and Hunting licenses; and Wildlife Management Area, Archery, Crossbow, Muzzleloading Gun, Turkey and Florida Waterfowl permits) Valid 12 months from specified beginning date...$80.50

Gold Sportsman's License: Includes all licenses and permits in the Sportsman's License plus Saltwater Fishing, Crawfish and Snook permits...$100.00

Military Gold Sportsman's License *Available only to Florida residents who are active or retired members of the U.S. Armed Forces (Armed Forces Reserve, Florida National Guard, Coast Guard or Coast Guard Reserve), upon submission of a current military identification card and military orders showing you are stationed in Florida or a Florida Drivers License. This license can only be purchased at county tax collectors' offices....$20.00

Nonresident:
3-Day Freshwater Fishing (Valid three days from specified beginning date)...$17.00

7-Day Freshwater Fishing (Valid for seven consecutive days from specified beginning date)...$30.00

12-Month Freshwater Fishing (Valid for 12 months from specified beginning date)...$47.00

Licenses may be purchased from county tax collectors or their subagents, who are generally located at tackle shops, fish camps and sporting goods stores. In addition to license and stamp fees listed above, subagents are entitled to an additional 50 cents. License fees are set by the Florida Legislature and are subject to change. Check our Web site for updates.

Freshwater License Exemptions (Up to Index)

• Florida residents 65 years of age or older who possess either a Resident Senior Citizen Hunting and Fishing Certificate, or proof of age and residency.

• Florida residents certified as totally and permanently disabled, who possess a Florida Resident Disabled Person Hunting and Fishing Certificate. Applicants need to provide a certification of total and permanent disability from the United States Armed Forces, Railroad Retirement Board, Florida Worker's Compensation or the United States Veterans Administration. Alternatively, current documentation from the Social Security Administration for Supplemental Security Income (SSI) or Supplemental Security Disability Income (SSDI) benefits is accepted

• Any person who has been accepted as a client for developmental disabilities by the Florida Agency for Persons with Disabilities upon submission of proof.

• Children under 16 years of age.

• Resident Freshwater Commercial Fishing License holders.

• Any resident who is a member of the U.S. Armed Forces and is not stationed in Florida, home on leave for 30 days or less, upon submission of orders.

• Any resident fishing in the county of his or her residence with live or natural bait, using poles or hand lines without a reel or other line retrieval mechanism (cane pole), for noncommercial purposes.

• Anyone fishing in a private fishing pond less than 20 acres. A private pond is a man-made pond constructed for the primary purpose of fishing, entirely within the property
  lines of the owner and with no surface water connection to public waters.

• Anyone fishing in a private pond of 20 acres or more where the pond owner has purchased a fish pond license at a fee of $3 per surface acre.

• Any person fishing in their county of residence on the homestead of their spouse or minor child, or any minor child fishing on the homestead of their parent.

• Anyone fishing in the St. Marys River or Lake Seminole (but not including tributary creeks in Florida), who has a valid Georgia fishing license.

• Anyone fishing during Free Fishing Weekend, April 4-5, 2009.

• Attention Florida and Georgia seniors (65 or older): Since 1988, Florida and Georgia have had a reciprocal agreement that honors exemptions for freshwater fishing license fees when seniors from one state fishes in the other state. Effective July 1, 2008, this reciprocal agreement will be discontinued, and you will be required to purchase a nonresident fishing license when Florida residents fish in Georgia or when Georgia residents fish in Florida. Visit MyFWC.com for further information on this issue.

Note: A valid Fishing License is required to fish by any method in a Fish Management Area.