Species learning profile
Discus
Symphysodon aequifasciatus
Discus (Symphysodon aequifasciatus) is a freshwater fish associated with river habitat in South America. Parents feed newly hatched young with nutritious skin mucus.
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Previously featured in Fishdle
At a glance
- Water
- Fresh water
- Habitat
- River
- Maximum length
- 23 cm
- Range
- South America
- Family
- Cichlidae
- Order
- Cichliformes
Observe
How to identify Discus
- Blue, green, red, or brown with wavy markings.
- Almost circular and extremely flat from side to side.
- Reported maximum length: 23 cm — roughly ruler-length. Maximum is not the same as typical adult size.
Field note: color, size, and markings can change with age, sex, season, depth, and lighting. Use several traits together.
Place and pattern
Where it lives—and how it behaves
Habitat and range
This species is associated with river habitat across South America. Flow, seasonal floods, connected side channels, and access to spawning reaches all shape its river habitat.
Behavior
Uses river habitat for feeding, shelter, migration, or reproduction.
Food-web connections
What it eats and why it matters
Diet
A species-dependent mix of algae, invertebrates, plants, and smaller fish.
Ecological role
It participates in a connected river food web where nutrients and animals move both upstream and downstream..
Remember
One fact worth keeping
Parents feed newly hatched young with nutritious skin mucus.
Think like a conservationist
A conservation lens
River fish depend on connected water. Dams, blocked migrations, pollution, and altered flow can matter even when the channel still looks wet.
This habitat lens is not a current population-status assessment. Status can differ among regions and change as new assessments are published; follow the reference links and local fisheries or wildlife agencies for current decisions.
Recall
Quick knowledge check
Which habitat is most closely associated with Discus in this guide?
Keep exploring
References and further reading
Fishdle summarizes stable identification and ecology concepts in plain language. Taxonomy and population knowledge continue to change, so use primary assessments and regional authorities for conservation or management decisions.
Make connections