Discus vs Oscar
Symphysodon discus compared with Astronotus ocellatus
Taxonomy & Classification
| Attribute | Discus | Oscar |
|---|---|---|
| Scientific Name | Symphysodon discus | Astronotus ocellatus |
| Order | Cichliformes | Cichliformes |
| Family | Cichlidae | Cichlidae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Discus | Oscar |
|---|---|---|
| Max Length | 20.0 cm | 45.0 cm |
| Max Weight | 0.25 kg | 1.6 kg |
| Color | 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. | Dark olive-brown to blackish body with irregular wavy orange-red markings forming a marbled or reticulated pattern; prominent black ocellus with orange ring at the upper tail base. |
Habitat & Environment
| Attribute | Discus | Oscar |
|---|---|---|
| Water Type | Freshwater | Freshwater |
| Depth Range | — | — |
| Geographic Range | 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 … | Native to the Amazon and Orinoco river basins in South America, including Peru, Colombia, and Brazil. Inhabits slow, deep, turbid rivers, flooded forests, and large … |
| Habitat | 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. … | Slow-moving rivers and floodplains of the Amazon and Orinoco basins, South America. Warm, murky water (22-28°C, pH 6-8). Inhabits areas with submerged logs and dense … |
Aquarium Suitability
| Attribute | Discus | Oscar |
|---|---|---|
| Min Tank Size | 250 L | 280 L |
| Temperature | 26-30 | 22-25 |
| pH Range | 5.0-7.0 | 6.0-8.0 |
| Care Level | Difficult | Moderate |
| Temperament | Peaceful | Aggressive |
Fishing Information
| Attribute | Discus | Oscar |
|---|---|---|
| Game Fish | No | Yes |
| Fight Rating | — | — |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Discus
Not consumed — a prized ornamental aquarium fish known as the 'king of the aquarium' for its disc-shaped body and brilliant colors.
Oscar
Not consumed — popular ornamental cichlid kept for its bold patterning and personality; occasionally eaten in parts of South America but primarily an aquarium species.
Species Overview
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.
Oscar
The oscar is a large, intelligent cichlid native to the Amazon basin. Known for its dog-like personality, it can recognize its owner and may beg for food. Oscars rearrange their tank decor and require spacious aquariums with robust filtration.