Guppy vs Wels Catfish
Poecilia reticulata compared with Silurus glanis
Taxonomy & Classification
| Attribute | Guppy | Wels Catfish |
|---|---|---|
| Scientific Name | Poecilia reticulata | Silurus glanis |
| Order | Cyprinodontiformes | Siluriformes |
| Family | Poeciliidae | Siluridae |
| Conservation Status | Least Concern | Least Concern |
Physical Traits
| Attribute | Guppy | Wels Catfish |
|---|---|---|
| Max Length | 6.0 cm | 500.0 cm |
| Max Weight | 0.002 kg | 300.0 kg |
| Color | 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. | Dark olive-green to slate-gray back with irregular mottled marbling of darker blotches; flanks grade to olive-yellow; scaleless smooth skin; belly pale cream to yellowish-white; head broad and flat. |
Habitat & Environment
| Attribute | Guppy | Wels Catfish |
|---|---|---|
| Water Type | Brackish | Brackish |
| Depth Range | — | 0-30m |
| Geographic Range | 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 … | Native to large river systems and lakes of central and eastern Europe from the Rhine basin east to the Caspian and Aral sea drainages. Introduced … |
| Habitat | 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. | Large rivers, lakes, and reservoirs across Europe and Asia (Volga, Danube, Rhine, Ob). Inhabits deep, slow-moving freshwater with soft substrates. Tolerates turbid water (15-25°C). Highly … |
Aquarium Suitability
| Attribute | Guppy | Wels Catfish |
|---|---|---|
| Min Tank Size | 38 L | — |
| Temperature | 22-28 | — |
| pH Range | 6.8-7.8 | — |
| Care Level | Easy | — |
| Temperament | Peaceful | — |
Fishing Information
| Attribute | Guppy | Wels Catfish |
|---|---|---|
| Game Fish | No | Yes |
| Fight Rating | — | 9/10 |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Guppy
Not consumed — a tiny ornamental livebearer prized by hobbyists for its dazzling color variations and ease of breeding in the aquarium.
Wels Catfish
Fatty, soft flesh with a mild, slightly sweet flavor; quality improves from cold, clean water fish. Popular in Central European cuisines — commonly smoked, fried, or braised with vegetables.
Species Overview
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.
Wels Catfish
The wels catfish is the largest freshwater fish in Europe, capable of exceeding 5 meters. Found in large rivers and lakes across the continent, it has been documented beaching itself to catch pigeons. It can live over 80 years.