Saltwater ChartKnown as the "Heart of the Florida Keys,"""" Marathon is a small city at the mid-point of the Keys island chain. It's a popular base for day trips to both the lower and upper Keys. Angling opportunities include spotted seatrout, mangrove snapper, cobia, tarpon and barracuda. The Seven Mile Bridge area provides an even larger variety of fish. Featured Species: Permit, Tarpon, Bonefish, Barracuda, Gray (Mangrove) Snapper, King Mackerel, Red Grouper, Crevalle Jack, Cobia, Dolphinfish, Sailfish, Spotted Seatrout and Wahoo Map Features: Tips and Techniques for Featured Species GPS Information 4 Access Locations Indicated 43Proven Fishing Areas Marked Area Marina Information Artificial Reefs Indicated with GPS (if applicable) Covers Seven Mile Bridge to Conch Key Area Guide: