Arapaima vs Cobia
Arapaima gigas compared with Rachycentron canadum
Taxonomy & Classification
| Attribute | Arapaima | Cobia |
|---|---|---|
| Scientific Name | Arapaima gigas | Rachycentron canadum |
| Order | Osteoglossiformes | Carangiformes |
| Family | Arapaimidae | Rachycentridae |
| Conservation Status | Data Deficient | Least Concern |
Physical Traits
| Attribute | Arapaima | Cobia |
|---|---|---|
| Max Length | 450.0 cm | 200.0 cm |
| Max Weight | 200.0 kg | 68.0 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 brown to black back with two pale white or silver lateral stripes flanking a dark brown mid-lateral band; belly cream-white; juveniles display more vivid black, white, and orange banding. |
Habitat & Environment
| Attribute | Arapaima | Cobia |
|---|---|---|
| Water Type | Freshwater | Saltwater |
| Depth Range | — | 0-1200m |
| 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 … | Worldwide in tropical and subtropical oceans, absent only from the eastern Pacific. Found in the Gulf of Mexico, Caribbean, Indo-Pacific, and off Australia; frequents open … |
| 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. … | Pelagic, coral reefs, estuaries |
Fishing Information
| Attribute | Arapaima | Cobia |
|---|---|---|
| Game Fish | Yes | Yes |
| Fight Rating | 10/10 | 8/10 |
| 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.
Cobia
Firm, moist white flesh with a mild, buttery flavor; moderate fat and large, clean flakes. Extremely versatile — excellent grilled, smoked, raw as sashimi, or used in ceviche.
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.
Cobia
The cobia is a powerful pelagic fish that often follows large rays, sharks, and turtles. Its flattened head and elongated body resemble a shark. Excellent table fare with firm, white flesh, it is increasingly farmed in aquaculture.