Common Goldfish vs Guppy
Carassius auratus compared with Poecilia reticulata
Taxonomy & Classification
| Attribute | Common Goldfish | Guppy |
|---|---|---|
| Scientific Name | Carassius auratus | Poecilia reticulata |
| Order | Cypriniformes | Cyprinodontiformes |
| Family | Cyprinidae | Poeciliidae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Common Goldfish | Guppy |
|---|---|---|
| Max Length | 45.0 cm | 6.0 cm |
| Max Weight | 2.0 kg | 0.002 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. | Males display highly variable iridescent patterns on a gray-olive body; spots, reticulations, and solid patches of red, orange, blue, green, and black; flowing fantail fins often multicolored. |
Habitat & Environment
| Attribute | Common Goldfish | Guppy |
|---|---|---|
| Water Type | Brackish | Brackish |
| 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 … | Native to freshwater and slightly brackish streams of northern South America including Venezuela, Trinidad, and Barbados. Tolerates a wide range of salinities; introduced on every … |
| 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 … | Slow-moving rivers, streams, ponds, and drainage ditches of northern South America (Venezuela, Trinidad). Warm, shallow water with dense vegetation (22-28°C). Highly adaptable; introduced worldwide. |
Aquarium Suitability
| Attribute | Common Goldfish | Guppy |
|---|---|---|
| Min Tank Size | 150 L | 38 L |
| Temperature | 10-24 | 22-28 |
| pH Range | 6.0-8.0 | 6.8-7.8 |
| Care Level | Easy | Easy |
| Temperament | Peaceful | Peaceful |
Fishing Information
| Attribute | Common Goldfish | Guppy |
|---|---|---|
| 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.
Guppy
Not consumed — a tiny ornamental livebearer prized by hobbyists for its dazzling color variations and ease of breeding in the aquarium.
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.
Guppy
The guppy is one of the most widely distributed tropical fish, found in freshwater habitats across the Americas. Males display vivid colors and elaborate tail patterns to attract females. They are live-bearers, giving birth to free-swimming fry.