Betta vs Wels Catfish
Betta splendens compared with Silurus glanis
Taxonomy & Classification
| Attribute | Betta | Wels Catfish |
|---|---|---|
| Scientific Name | Betta splendens | Silurus glanis |
| Order | Anabantiformes | Siluriformes |
| Family | Osphronemidae | Siluridae |
| Conservation Status | Vulnerable | Least Concern |
Physical Traits
| Attribute | Betta | Wels Catfish |
|---|---|---|
| Max Length | 7.0 cm | 500.0 cm |
| Max Weight | 0.003 kg | 300.0 kg |
| Color | Highly variable in domesticated strains; wild type is dull brownish-green with iridescent blue-green scale patches; long flowing fins display intense reds, blues, purples, and teals with iridescent sheen. | 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 | Betta | Wels Catfish |
|---|---|---|
| Water Type | Freshwater | Brackish |
| Depth Range | — | 0-30m |
| Geographic Range | Native to the Mekong River basin in Thailand, Laos, and Cambodia. Found in shallow rice paddies, irrigation ditches, ponds, and slow-moving lowland streams across the … | 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 | Shallow, densely vegetated ponds, rice paddies, and slow streams of Thailand and Southeast Asia. Tolerates oxygen-poor, warm water (24-30°C). Males highly territorial; builds bubble nests … | 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 | Betta | Wels Catfish |
|---|---|---|
| Min Tank Size | 19 L | — |
| Temperature | 24-30 | — |
| pH Range | 6.5-7.5 | — |
| Care Level | Easy | — |
| Temperament | Aggressive | — |
Fishing Information
| Attribute | Betta | Wels Catfish |
|---|---|---|
| Game Fish | No | Yes |
| Fight Rating | — | 9/10 |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Betta
Not consumed — ornamental aquarium species prized for its flowing fins and vibrant coloration; classified Vulnerable in the wild.
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
Betta
The Siamese fighting fish is famous for its vibrant colors and flowing fins, developed through centuries of selective breeding. Males are highly territorial and will flare their gill covers at rivals. They possess a labyrinth organ for breathing atmospheric air.
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.