Common Goldfish vs Discus
Carassius auratus compared with Symphysodon discus
Taxonomy & Classification
| Attribute | Common Goldfish | Discus |
|---|---|---|
| Scientific Name | Carassius auratus | Symphysodon discus |
| Order | Cypriniformes | Cichliformes |
| Family | Cyprinidae | Cichlidae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Common Goldfish | Discus |
|---|---|---|
| Max Length | 45.0 cm | 20.0 cm |
| Max Weight | 2.0 kg | 0.25 kg |
| Color | Brilliant orange to deep golden-yellow body with a metallic sheen across all scales; domesticated forms range from white, yellow, and red to black and calico bicolor combinations. | 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 | Common Goldfish | Discus |
|---|---|---|
| Water Type | Brackish | Freshwater |
| Depth Range | 0-20m | — |
| Geographic Range | Originates from rivers and lakes of eastern China and possibly Korea; domesticated for over 1,000 years. Wild relatives inhabit slow rivers, ponds, and slightly brackish … | 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 | Ponds, lakes, slow rivers across East Asia; introduced worldwide. Tolerates wide temperature range (10-30°C) and turbid water. Prefers shallow, vegetated areas with soft substrates. Domestic … | 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 | Common Goldfish | Discus |
|---|---|---|
| Min Tank Size | 150 L | 250 L |
| Temperature | 10-24 | 26-30 |
| pH Range | 6.0-8.0 | 5.0-7.0 |
| Care Level | Easy | Difficult |
| Temperament | Peaceful | Peaceful |
Fishing Information
| Attribute | Common Goldfish | Discus |
|---|---|---|
| Game Fish | Yes | No |
| Fight Rating | — | — |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Common Goldfish
Not consumed — a classic ornamental aquarium and pond fish; its vivid color and hardy nature make it one of the world's most popular decorative species.
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
Common Goldfish
The goldfish was one of the first fish to be domesticated, with selective breeding in China dating back over 1,000 years. Despite common misconceptions, goldfish can live 10-15 years with proper care and require far more space than a small bowl.
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.