Atlantic Bluefin Tuna vs Wels Catfish
Thunnus thynnus compared with Silurus glanis
Taxonomy & Classification
| Attribute | Atlantic Bluefin Tuna | Wels Catfish |
|---|---|---|
| Scientific Name | Thunnus thynnus | Silurus glanis |
| Order | Scombriformes | Siluriformes |
| Family | Scombridae | Siluridae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Atlantic Bluefin Tuna | Wels Catfish |
|---|---|---|
| Max Length | 458.0 cm | 500.0 cm |
| Max Weight | 680.0 kg | 300.0 kg |
| Color | 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. | Dark olive-green to slate-gray back with irregular mottled marbling of darker blotches; flanks grade to olive-yellow; scaleless smooth skin; belly pale cream to yellowish-white; head broad and flat. |
Habitat & Environment
| Attribute | Atlantic Bluefin Tuna | Wels Catfish |
|---|---|---|
| Water Type | Saltwater | Brackish |
| Depth Range | 0-985m | 0-30m |
| Geographic Range | 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 … | Native to large river systems and lakes of central and eastern Europe from the Rhine basin east to the Caspian and Aral sea drainages. Introduced … |
| Habitat | 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 … | Large rivers, lakes, and reservoirs across Europe and Asia (Volga, Danube, Rhine, Ob). Inhabits deep, slow-moving freshwater with soft substrates. Tolerates turbid water (15-25°C). Highly … |
Fishing Information
| Attribute | Atlantic Bluefin Tuna | Wels Catfish |
|---|---|---|
| Game Fish | Yes | Yes |
| Fight Rating | 10/10 | 9/10 |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
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.
Wels Catfish
Fatty, soft flesh with a mild, slightly sweet flavor; quality improves from cold, clean water fish. Popular in Central European cuisines — commonly smoked, fried, or braised with vegetables.
Species Overview
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.
Wels Catfish
The wels catfish is the largest freshwater fish in Europe, capable of exceeding 5 meters. Found in large rivers and lakes across the continent, it has been documented beaching itself to catch pigeons. It can live over 80 years.