March has arrived, and the waters around Grassy Key are warming up, bringing with them a wide variety of fish species that are active and ready to bite. Whether you're a seasoned angler or a beginner looking to enjoy the thrill of fishing, the waters around Marathon, Florida, offer exciting opportunities for all. Here's the latest fishing report for the Marathon area and what you can expect when you book your next fishing adventure with Grassy Flats.
Inshore Fishing: A Fisherman’s Paradise
March is the perfect time to head out into the shallows and mangroves around Grassy Key. As the water warms up, species like snook, bonefish, and permit become more active, offering exciting fishing experiences for all skill levels.
Snook: As the waters heat up, snook are on the move and more aggressive. Live bait like pilchards and shrimp are the best way to lure these prized fish in.
Bonefish: Known for their speed and challenging fight, bonefish are one of the most sought-after species in the Keys. They are commonly found in the shallow flats, making March an excellent time to target them.
Permit: Permit are highly sought after for their strong fight and elusive nature. March offers an ideal window to target permit, and using live crabs or shrimp is a great way to lure them in for the catch of a lifetime.

Offshore Action: Sailfish, Mahi Mahi, and Blackfin Tuna
For those looking to head offshore, March offers some exceptional big game fishing opportunities. The waters are teeming with sailfish, mahi mahi, and blackfin tuna, providing anglers with an action-packed day on the water.
Sailfish: While the peak season for sailfish runs through the winter, March still offers great chances to hook these incredible creatures. Sailfish are known for their thrilling, high-energy fight, and you’ll find them near the Gulf Stream.
Mahi Mahi: Mahi mahi are abundant in the waters offshore, especially during the spring months. These colorful fish put up a fantastic fight, and their size and strength make for an exciting catch. You’ll find them around floating debris or weed lines.
Blackfin Tuna: Blackfin tuna are also active in the offshore waters during March. Known for their speed and strength, blackfin tuna are an exciting challenge when you’re reeling them in.
Reefs & Wrecks: Snapper and Grouper Galore
If you prefer fishing the reefs and wrecks, March is the perfect time to target snapper and grouper. These species are abundant around the Florida Keys, and the waters around Marathon are home to numerous reefs and wrecks that offer great fishing spots.
Snapper: Various species of snapper, including yellowtail and mutton, thrive in the reefs and wrecks. Yellowtail snapper are a popular catch, known for their great taste and active feeding behavior. Live bait or cut baits work wonders for attracting them.
Grouper: Grouper species are commonly found in deeper waters around wrecks and reefs. These large fish are a blast to catch, but be prepared for a fight as they try to make their way back to their rocky hideouts.

The Best Way to Experience Fishing in Marathon: Book Rhum Line Charters
Rhum Line Charters is available for you to book directly for an unforgettable fishing adventure. Whether you're an experienced angler or looking to enjoy a relaxing day on the water, our expert captain and crew are here to ensure you have a great time.
Rhum Line Charters offers offshore trips, and our boat is fully equipped for whatever type of fishing experience you’re after. We provide all the gear, bait, and local knowledge you need to catch some of the most sought-after species in the Keys.
March is shaping up to be an incredible month for fishing around Grassy Key. Whether you’re casting from the shore or heading offshore on The Rhum Line, you’ll find plenty of opportunities to catch some amazing fish.
Don't wait—reach out today to secure your fishing adventure with Rhum Line Charters or to book your stay at Grassy Flats. We're excited to welcome you to paradise and put you on the fish of a lifetime!