Species learning profile
Royal flagfin
Pterronotropis signipinnis
Royal flagfin (Pterronotropis signipinnis) is a freshwater fish associated with river habitat in North America. Males flash blue bodies and red-black dorsal fins during group courtship.
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At a glance
- Agua
- Agua dulce
- Habitat
- Río
- Longitud máxima
- 6 cm
- Distribución
- Norteamérica
- Familia
- Leuciscidae
- Orden
- Cypriniformes
Observe
How to identify Royal flagfin
- Males flash blue bodies and red-black dorsal fins during group courtship.
- Guide context: river habitat in North America.
- Reported maximum length: 6 cm — about hand-length or smaller. 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 North America. Flow, seasonal floods, connected side channels, and access to spawning reaches all shape its river habitat.
Behavior
Schools in slow, vegetated streams
Food-web connections
What it eats and why it matters
Diet
Tiny invertebrates and plant material.
Ecological role
Small prey and insect consumer in coastal plain waters.
Remember
One fact worth keeping
Royal flagfin puede medir unos 6 cm y suele encontrarse cerca de Río.
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 Royal flagfin 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