Tuna

Bigeye Tuna

Thunnus obesus

3.8

At a Glance

Avg Length

60"

Avg Weight

100 lbs

World Record

392.6 lbs

Habitat

Deep Tropical Offshore

About the Bigeye Tuna

Bigeye Tuna (Thunnus obesus). Found in Deep Tropical Offshore. Average length 60 in, weight 100.0 lbs. World record: 392.6 lbs (Ocean City, MD).

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 tropical offshore 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 100 pounds, though fish in prime habitat regularly exceed these averages. The all-tackle world record stands at 392.6 lbs, set at Ocean City, MD, 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 Tropical Offshore.

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: Squid.

Technique: Deep 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 392.6 lbs, caught at Ocean City, MD. 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.