Bigeye Tuna
Thunnus obesus
At a Glance
Avg Length
60"
Avg Weight
150 lbs
World Record
435 lbs
Habitat
Deep Offshore, Night Surface
About the Bigeye Tuna
Bigeye Tuna (Thunnus obesus) inhabits deep offshore, night surface. Popular technique: trolling using trolling lures.
The Bigeye Tuna is one of the most recognizable saltwater species in North American waters, classified scientifically as <em>Thunnus obesus</em>. It belongs to the Tuna group, most commonly found in deep offshore, night surface environments. Anglers target this species for both sport and table fare, and it appears across a broad range of water bodies throughout the United States.
A typical Bigeye Tuna runs 60 inches in length and weighs around 150 pounds, though fish in prime habitat regularly exceed these averages. The all-tackle world record stands at 435 lbs, set at Pozo el Berriel, Canaries, making it a legitimate target for anglers chasing personal bests. Conservation status varies by region — check local regulations before keeping fish, as some waters have slot limits or catch-and-release requirements in place.
Habitat & Range
Primary habitat: Deep Offshore, Night Surface.
The Bigeye Tuna thrives across a wide range of saltwater environments throughout North America. Seasonal movements are driven by water temperature — fish tend to move into shallower water during spring and fall feeding periods, and push deeper or seek cover during the heat of summer and cold of winter. Understanding these patterns is critical to locating fish consistently across the season.
How to Fish for Bigeye Tuna
Best bait: Trolling Lures.
Technique: Trolling.
Match your presentation to the season and conditions. In clear water, downsize your bait and slow your retrieve. In stained or muddy water, switch to high-contrast colors and add vibration. Early morning and evening are the most productive windows during summer months. During spawning season, fish become highly territorial and will strike out of aggression as well as hunger.
World Record
The all-tackle world record Bigeye Tuna weighed 435 lbs, caught at Pozo el Berriel, Canaries. This record represents the upper end of what this species achieves under ideal conditions. Most anglers targeting personal bests focus on proven trophy waters with the right combination of habitat, forage base, and light fishing pressure.
State Regulations
Regulations vary by state and water body. Before fishing for Bigeye Tuna, verify current size limits, bag limits, and open seasons with your state fish and wildlife agency. Check your state's fishing license requirements and season dates at the FishLog Fishing License guide.
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