Species learning profile
Bigeye tuna
Thunnus obesus
Bigeye tuna (Thunnus obesus) is a saltwater fish associated with open ocean habitat in Global. Large eyes and heat-conserving physiology support deep, dim-water feeding.
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At a glance
- Perairan
- Air laut
- Habitat
- Laut lepas
- Panjang maksimum
- 250 cm
- Sebaran
- Seluruh dunia
- Famili
- Scombridae
- Ordo
- Scombriformes
Observe
How to identify Bigeye tuna
- Large eyes and heat-conserving physiology support deep, dim-water feeding.
- Guide context: open ocean habitat in Global.
- Reported maximum length: 250 cm — a genuinely giant fish. Maximum is not the same as typical adult size.
Field note: color, size, and markings can change with age, sex, season, depth, and lighting. Use several traits together.
Place and pattern
Where it lives—and how it behaves
Habitat and range
This species is associated with open ocean habitat across Global. With little fixed shelter, currents, temperature fronts, depth, and moving prey define its open-ocean world.
Behavior
Dives deep by day and rises at night
Food-web connections
What it eats and why it matters
Diet
Fish, squid, and crustaceans.
Ecological role
Connects deep scattering layers with surface waters.
Remember
One fact worth keeping
Bigeye tuna dapat tumbuh hingga sekitar 250 cm dan sering ditemukan di sekitar Laut lepas.
Think like a conservationist
A conservation lens
Wide-ranging ocean fish can cross many jurisdictions, so bycatch, harvest limits, and international cooperation matter.
This habitat lens is not a current population-status assessment. Status can differ among regions and change as new assessments are published; follow the reference links and local fisheries or wildlife agencies for current decisions.
Recall
Quick knowledge check
Which habitat is most closely associated with Bigeye tuna in this guide?
Keep exploring
References and further reading
Fishdle summarizes stable identification and ecology concepts in plain language. Taxonomy and population knowledge continue to change, so use primary assessments and regional authorities for conservation or management decisions.
Make connections