Arapaima vs Betta
Arapaima gigas compared with Betta splendens
Taxonomy & Classification
| Attribute | Arapaima | Betta |
|---|---|---|
| Scientific Name | Arapaima gigas | Betta splendens |
| Order | Osteoglossiformes | Anabantiformes |
| Family | Arapaimidae | Osphronemidae |
| Conservation Status | Data Deficient | Vulnerable |
Physical Traits
| Attribute | Arapaima | Betta |
|---|---|---|
| Max Length | 450.0 cm | 7.0 cm |
| Max Weight | 200.0 kg | 0.003 kg |
| Color | Dark olive-gray to grayish-black back with large scales that become vivid red-orange with black borders on the posterior flanks; belly pale cream; caudal fin reddish and rounded. | 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. |
Habitat & Environment
| Attribute | Arapaima | Betta |
|---|---|---|
| Water Type | Freshwater | Freshwater |
| Depth Range | — | — |
| Geographic Range | Restricted to the Amazon River basin in Brazil, Peru, Guyana, and Bolivia. Inhabits flooded várzea lakes, oxbows, and large river channels; surfaces frequently to breathe … | 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 … |
| Habitat | Floodplain lakes (várzea) and large river channels of the Amazon basin. Slow-moving, shallow, warm freshwater (26-30°C). An obligate air-breather; rises to surface to gulp air. … | 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 … |
Aquarium Suitability
| Attribute | Arapaima | Betta |
|---|---|---|
| Min Tank Size | — | 19 L |
| Temperature | — | 24-30 |
| pH Range | — | 6.5-7.5 |
| Care Level | — | Easy |
| Temperament | — | Aggressive |
Fishing Information
| Attribute | Arapaima | Betta |
|---|---|---|
| Game Fish | Yes | No |
| Fight Rating | 10/10 | — |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Arapaima
Large, firm white fillets with a mild, clean flavor and low fat; historically a staple protein in Amazonian communities. Often salted and dried; sustainable harvest is tightly regulated.
Betta
Not consumed — ornamental aquarium species prized for its flowing fins and vibrant coloration; classified Vulnerable in the wild.
Species Overview
Arapaima
The arapaima is one of the largest freshwater fish in the world, reaching up to 4.5 meters. An obligate air-breather, it must surface every 10-20 minutes to gulp air. Its tongue is bony and used to crush prey against the roof of its mouth.
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.