Atlantic Bluefin Tuna vs Discus
Thunnus thynnus compared with Symphysodon discus
Taxonomy & Classification
| Attribute | Atlantic Bluefin Tuna | Discus |
|---|---|---|
| Scientific Name | Thunnus thynnus | Symphysodon discus |
| Order | Scombriformes | Cichliformes |
| Family | Scombridae | Cichlidae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Atlantic Bluefin Tuna | Discus |
|---|---|---|
| Max Length | 458.0 cm | 20.0 cm |
| Max Weight | 680.0 kg | 0.25 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. | Deep-bodied disc shape with vibrant turquoise-blue wavy horizontal lines over a reddish-brown to orange-brown base; fins edged in vivid blue with red striping; wild forms show 9 dark vertical bars. |
Habitat & Environment
| Attribute | Atlantic Bluefin Tuna | Discus |
|---|---|---|
| Water Type | Saltwater | Freshwater |
| Depth Range | 0-985m | — |
| 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 … | Restricted to the central Amazon River basin in Brazil, particularly around the confluence of the Rio Negro and Rio Solimões. Prefers warm, soft, highly acidic … |
| 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 … | Warm, blackwater rivers of the Amazon basin, particularly the Rio Negro and tributaries. Prefers soft, acidic water (pH 4.5-6.5, 26-31°C) with driftwood and minimal current. … |
Aquarium Suitability
| Attribute | Atlantic Bluefin Tuna | Discus |
|---|---|---|
| Min Tank Size | — | 250 L |
| Temperature | — | 26-30 |
| pH Range | — | 5.0-7.0 |
| Care Level | — | Difficult |
| Temperament | — | Peaceful |
Fishing Information
| Attribute | Atlantic Bluefin Tuna | Discus |
|---|---|---|
| Game Fish | Yes | No |
| Fight Rating | 10/10 | — |
| 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.
Discus
Not consumed — a prized ornamental aquarium fish known as the 'king of the aquarium' for its disc-shaped body and brilliant colors.
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.
Discus
The discus is often called the 'King of the Aquarium' for its disc-shaped body and stunning color patterns. Native to the Amazon floodplains, it requires warm, soft, acidic water and feeds its fry with a mucus secretion from its skin.