Arapaima vs Goliath Grouper
Arapaima gigas compared with Epinephelus itajara
Taxonomy & Classification
| Attribute | Arapaima | Goliath Grouper |
|---|---|---|
| Scientific Name | Arapaima gigas | Epinephelus itajara |
| Order | Osteoglossiformes | Perciformes/Serranoidei |
| Family | Arapaimidae | Epinephelidae |
| Conservation Status | Data Deficient | Vulnerable |
Physical Traits
| Attribute | Arapaima | Goliath Grouper |
|---|---|---|
| Max Length | 450.0 cm | 250.0 cm |
| Max Weight | 200.0 kg | 363.0 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. | Yellow-brown to olive-green body densely covered with small dark brown spots and irregular blotches; 3–4 faint pale vertical bands on the flanks; juveniles show bolder contrasting yellow and black stripes. |
Habitat & Environment
| Attribute | Arapaima | Goliath Grouper |
|---|---|---|
| Water Type | Freshwater | Saltwater |
| Depth Range | — | 0-100m |
| 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 … | Tropical western Atlantic from Florida and the Gulf of Mexico through the Caribbean Sea to Brazil, and eastern Pacific from the Gulf of California to … |
| 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. … | Neritic, coral reefs, estuaries |
Fishing Information
| Attribute | Arapaima | Goliath Grouper |
|---|---|---|
| Game Fish | Yes | Yes |
| Fight Rating | 10/10 | 9/10 |
| 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.
Goliath Grouper
Firm, flaky white flesh with a mild, sweet flavor; harvest is heavily restricted or banned throughout most of its range due to Vulnerable status. Catch-and-release strongly encouraged.
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.
Goliath Grouper
The goliath grouper is the largest grouper in the Atlantic Ocean. This massive reef dweller can swallow prey whole and produces a distinctive booming sound by contracting its swim bladder to ward off intruders.