Florida · Keys
MAHI MAHI FISHING
IN MARATHON
Marathon is an outstanding destination for mahi mahi fishing, with peak season in April, May, June and good catches in March, August, September. Book a charter and target mahi mahi with local experts.
About Mahi Mahi Fishing in Marathon
Also called Dolphin or Dorado. Stunningly beautiful and acrobatic. Excellent eating.
Mahi Mahi — also called Dolphin or Dorado — are the most brilliantly colored fish in the ocean. Their iridescent body shimmers with electric blues, greens, and golds that literally change before your eyes. Males (called "bulls") develop a prominent flat forehead, while females ("cows") have a more rounded head profile. These fast-growing pelagic fish are found in blue water near floating debris, weed lines, and current edges. They are acrobatic fighters that tailwalk across the surface and make spectacular aerial leaps.
Scientific name: Coryphaena hippurus
Mahi Mahi Seasonal Calendar — Marathon
Month-by-month availability for mahi mahi in Marathon, FL.
How to Catch Mahi Mahi in Marathon
Techniques & Bait
Trolling ballyhoo rigged with colorful duster/lure combinations along weed lines, current edges, and near floating debris is the classic technique. Once a school is located, stop the boat and pitch live pilchards, cut ballyhoo, or small live baits to the school — mahi travel in groups and multiple hookups are common. Casting light jigs, spoons, or fly-rod streamers to fish visible near floating objects is incredibly exciting. Keep one fish in the water next to the boat to hold the school in place while catching others.
Recommended Tackle
Medium spinning or conventional rod (6'6"-7 ft), 4000-5000 reel, 20-30 lb braid, 30-40 lb fluorocarbon leader. For trolling: 20-30 lb class conventional rigs. Mahi have sandpaper-like mouths — fluorocarbon leader works fine (no wire needed).
Best Deep Sea Fishing Fishing Spots in Marathon
Top spots where local captains target mahi mahi and other deep sea fishing species.
Marathon Hump (Middle Hump)
The Marathon Hump is a prominent deepwater seamount south of Marathon where the ocean floor rises dramatically from 1,100 feet to around 480 feet. This structure concentrates blackfin tuna, yellowfin tuna, wahoo, and mahi-mahi, and is one of the most productive deep-dropping spots for swordfish in the Middle Keys. The Hump is a bucket-list destination for serious offshore anglers.
Gulf Stream (Marathon)
The Gulf Stream flows approximately 10-15 miles south of Marathon's reef line, bringing warm bluewater current and pelagic species within range. Sailfish, mahi-mahi, wahoo, and blackfin tuna patrol the Stream edges, especially along weed lines and color changes. Marathon's central Keys location provides access to productive Gulf Stream fishing grounds.
West Hump (from Marathon)
The West Hump is another deepwater seamount accessible from Marathon, lying roughly 20 miles southwest. The bottom rises from deep water to create a fish-concentrating feature that holds swordfish, tuna, wahoo, and mahi-mahi. Marathon boats can fish both the Marathon Hump and West Hump on a single offshore trip when conditions allow.
Marathon Deep Wrecks
Several deep wrecks lie in 200-plus feet of water south of Marathon along the outer edge of the reef system. These sunken vessels hold large amberjack, almaco jack, barracuda, and grouper on the structure, while pelagics cruise overhead in the current. Deep wreck fishing is a productive alternative to humps when targeting bottom species offshore.
Other Species in Marathon
More fish you can target while visiting Marathon.
Mahi Mahi Fishing in Marathon — FAQ
The peak months for Mahi Mahi fishing in Marathon are April, May, June, July. During these months, Mahi Mahi are most active and abundant in the Marathon area.
Mahi Mahi fishing charters in Marathon are typically deep sea fishing trips. Prices vary by trip duration and group size. Most charters include all gear, bait, licenses, and fish cleaning.
Trolling ballyhoo rigged with colorful duster/lure combinations along weed lines, current edges, and near floating debris is the classic technique. Once a school is located, stop the boat and pitch live pilchards, cut ballyhoo, or small live baits to the school — mahi travel in groups and multiple hookups are common. Casting light jigs, spoons, or fly-rod streamers to fish visible near floating objects is incredibly exciting. Keep one fish in the water next to the boat to hold the school in place while catching others.
No — when you book a charter in Marathon, your captain provides all required Florida fishing licenses as part of the trip.
Mahi Mahi regulations in Florida include minimum size limits and bag limits that vary by season. Your captain will know the current regulations and ensure compliance.
While targeting Mahi Mahi in Marathon, you may also catch Blackfin Tuna, Tarpon, Sailfish, Mangrove Snapper, Snook. Many charter trips target multiple species for the best action.
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