Cobia vs Discus
Rachycentron canadum compared with Symphysodon discus
Taxonomy & Classification
| Attribute | Cobia | Discus |
|---|---|---|
| Scientific Name | Rachycentron canadum | Symphysodon discus |
| Order | Carangiformes | Cichliformes |
| Family | Rachycentridae | Cichlidae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Cobia | Discus |
|---|---|---|
| Max Length | 200.0 cm | 20.0 cm |
| Max Weight | 68.0 kg | 0.25 kg |
| Color | 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. | 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 | Cobia | Discus |
|---|---|---|
| Water Type | Saltwater | Freshwater |
| Depth Range | 0-1200m | — |
| Geographic Range | 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 … | 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 | Pelagic, coral reefs, estuaries | 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 | Cobia | Discus |
|---|---|---|
| Min Tank Size | — | 250 L |
| Temperature | — | 26-30 |
| pH Range | — | 5.0-7.0 |
| Care Level | — | Difficult |
| Temperament | — | Peaceful |
Fishing Information
| Attribute | Cobia | Discus |
|---|---|---|
| Game Fish | Yes | No |
| Fight Rating | 8/10 | — |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
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.
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
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.
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.