Arapaima vs Atlantic Bluefin Tuna
Arapaima gigas compared with Thunnus thynnus
Taxonomy & Classification
| Attribute | Arapaima | Atlantic Bluefin Tuna |
|---|---|---|
| Scientific Name | Arapaima gigas | Thunnus thynnus |
| Order | Osteoglossiformes | Scombriformes |
| Family | Arapaimidae | Scombridae |
| Conservation Status | Data Deficient | Least Concern |
Physical Traits
| Attribute | Arapaima | Atlantic Bluefin Tuna |
|---|---|---|
| Max Length | 450.0 cm | 458.0 cm |
| Max Weight | 200.0 kg | 680.0 kg |
| Color | Dark olive-gray to grayish-black back with large scales that become vivid red-orange with black borders on the posterior flanks; belly pale cream; caudal fin reddish and rounded. | Dark metallic blue-black back with a bright silvery-white lower belly; upper flanks show iridescent blue and green tones; short yellow finlets have black margins; second dorsal and pectoral fins dark. |
Habitat & Environment
| Attribute | Arapaima | Atlantic Bluefin Tuna |
|---|---|---|
| Water Type | Freshwater | Saltwater |
| Depth Range | — | 0-985m |
| Geographic Range | Restricted to the Amazon River basin in Brazil, Peru, Guyana, and Bolivia. Inhabits flooded várzea lakes, oxbows, and large river channels; surfaces frequently to breathe … | North Atlantic Ocean from the Gulf of Mexico and Caribbean north to Norway and Iceland, including the Mediterranean and Black seas. Two spawning populations: western … |
| Habitat | Floodplain lakes (várzea) and large river channels of the Amazon basin. Slow-moving, shallow, warm freshwater (26-30°C). An obligate air-breather; rises to surface to gulp air. … | Open ocean in the Atlantic, Mediterranean, and Black Sea. Highly migratory, ranging from temperate to subtropical surface waters (0-100m, optimum 15-25°C). Aggregates seasonally to feed … |
Fishing Information
| Attribute | Arapaima | Atlantic Bluefin Tuna |
|---|---|---|
| Game Fish | Yes | Yes |
| Fight Rating | 10/10 | 10/10 |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Arapaima
Large, firm white fillets with a mild, clean flavor and low fat; historically a staple protein in Amazonian communities. Often salted and dried; sustainable harvest is tightly regulated.
Atlantic Bluefin Tuna
The pinnacle of raw fish dining — intensely rich, fatty tuna-o-toro with deep red color and buttery, umami-forward flavor. Commands the highest prices globally in Japanese sushi markets.
Species Overview
Arapaima
The arapaima is one of the largest freshwater fish in the world, reaching up to 4.5 meters. An obligate air-breather, it must surface every 10-20 minutes to gulp air. Its tongue is bony and used to crush prey against the roof of its mouth.
Atlantic Bluefin Tuna
The Atlantic bluefin tuna is one of the largest bony fish, capable of crossing the Atlantic in under 60 days. A single specimen has sold for over $3 million at Tokyo's fish market. It can maintain a body temperature above the surrounding water.