Florida · Keys
BLACKFIN TUNA FISHING
IN MARATHON
Marathon is an outstanding destination for blackfin tuna fishing, with peak season in January, February, November and good catches in March, April, May. Book a charter and target blackfin tuna with local experts.
About Blackfin Tuna Fishing in Marathon
Smaller cousin of the yellowfin but excellent eating and great light-tackle sport.
Marathon is an outstanding destination for blackfin tuna fishing, offering peak season in January, February, November and good catches in March, April, May. The best months to target blackfin tuna here are January, February, November, December.
Scientific name: Thunnus atlanticus
Blackfin Tuna Seasonal Calendar — Marathon
Month-by-month availability for blackfin tuna in Marathon, FL.
How to Catch Blackfin Tuna in Marathon
Techniques & Bait
Consult your local charter captain for the most effective baits and techniques in the area.
Recommended Tackle
Your captain will provide all tackle and gear suited to the target species and local conditions.
Best Deep Sea Fishing Fishing Spots in Marathon
Top spots where local captains target blackfin tuna 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.
Blackfin Tuna Fishing in Marathon — FAQ
The peak months for Blackfin Tuna fishing in Marathon are January, February, November, December. During these months, Blackfin Tuna are most active and abundant in the Marathon area.
Blackfin Tuna 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.
Consult your local charter captain for the most effective baits and techniques in the area.
No — when you book a charter in Marathon, your captain provides all required Florida fishing licenses as part of the trip.
Blackfin Tuna 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 Blackfin Tuna in Marathon, you may also catch Mahi Mahi, Tarpon, Sailfish, Mangrove Snapper, Snook. Many charter trips target multiple species for the best action.
Ready to Catch Blackfin Tuna in Marathon?
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