Species learning profile
Thon rouge du Nord
Thunnus thynnus
Atlantic bluefin tuna (Thunnus thynnus) is a saltwater fish associated with open ocean habitat in Atlantic. It can keep parts of its body warmer than the surrounding sea.
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At a glance
- Eau
- Eau salée
- Habitat
- Haute mer
- Longueur maximale
- 458 cm
- Répartition
- Atlantique
- Famille
- Scombridae
- Ordre
- Scombriformes
Observe
How to identify Thon rouge du Nord
- Metallic dark blue above and silver-white below.
- Deep, muscular torpedo shape with short finlets near the tail.
- Reported maximum length: 458 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 Atlantic. With little fixed shelter, currents, temperature fronts, depth, and moving prey define its open-ocean world.
Behavior
Uses open ocean habitat for feeding, shelter, migration, or reproduction.
Food-web connections
What it eats and why it matters
Diet
Schooling fish, squid, and crustaceans.
Ecological role
It helps move energy across great distances in a food web with few physical boundaries..
Remember
One fact worth keeping
Thon rouge du Nord peut atteindre environ 458 cm et vit souvent près de Haute mer.
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 Atlantic bluefin 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