Discus vs European Sturgeon
Symphysodon discus compared with Acipenser sturio
Taxonomy & Classification
| Attribute | Discus | European Sturgeon |
|---|---|---|
| Scientific Name | Symphysodon discus | Acipenser sturio |
| Order | Cichliformes | Acipenseriformes |
| Family | Cichlidae | Acipenseridae |
| Conservation Status | Least Concern | Critically Endangered |
Physical Traits
| Attribute | Discus | European Sturgeon |
|---|---|---|
| Max Length | 20.0 cm | 600.0 cm |
| Max Weight | 0.25 kg | 400.0 kg |
| Color | Deep-bodied disc shape with vibrant turquoise-blue wavy horizontal lines over a reddish-brown to orange-brown base; fins edged in vivid blue with red striping; wild forms show 9 dark vertical bars. | Gray-brown to dark brownish-black back with 5 rows of bony scutes that are yellowish-white; sides pale grayish-brown to whitish; belly creamy-white; thick armored body with a shark-like heterocercal tail. |
Habitat & Environment
| Attribute | Discus | European Sturgeon |
|---|---|---|
| Water Type | Freshwater | Freshwater & Saltwater |
| Depth Range | — | 4-93m |
| Geographic Range | Restricted to the central Amazon River basin in Brazil, particularly around the confluence of the Rio Negro and Rio Solimões. Prefers warm, soft, highly acidic … | Historically ranged across European coastal waters from the North Sea and Baltic to the Mediterranean and Black seas, spawning in major rivers like the Rhine, … |
| Habitat | Warm, blackwater rivers of the Amazon basin, particularly the Rio Negro and tributaries. Prefers soft, acidic water (pH 4.5-6.5, 26-31°C) with driftwood and minimal current. … | Neritic, estuaries |
Aquarium Suitability
| Attribute | Discus | European Sturgeon |
|---|---|---|
| Min Tank Size | 250 L | — |
| Temperature | 26-30 | — |
| pH Range | 5.0-7.0 | — |
| Care Level | Difficult | — |
| Temperament | Peaceful | — |
Cuisine & Edibility
Discus
Not consumed — a prized ornamental aquarium fish known as the 'king of the aquarium' for its disc-shaped body and brilliant colors.
European Sturgeon
Critically Endangered — consumption is illegal throughout its range. Historically prized for its delicate flesh and black caviar; now one of the world's most threatened fish species.
Species Overview
Discus
The discus is often called the 'King of the Aquarium' for its disc-shaped body and stunning color patterns. Native to the Amazon floodplains, it requires warm, soft, acidic water and feeds its fry with a mucus secretion from its skin.
European Sturgeon
The European sturgeon is a critically endangered anadromous fish that can live over 100 years. Once abundant in European rivers, it is now restricted to a small population in the Gironde estuary. Its eggs are harvested as beluga-grade caviar.