Species learning profile
Bull shark
Carcharhinus leucas
Bull shark (Carcharhinus leucas) is a brackish fish associated with estuary habitat in Global. Specialized salt balance lets it travel far into freshwater rivers.
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At a glance
- Eau
- Eau saumâtre
- Habitat
- Estuaire
- Longueur maximale
- 400 cm
- Répartition
- Monde entier
- Famille
- Carcharhinidae
- Ordre
- Carcharhiniformes
Observe
How to identify Bull shark
- Specialized salt balance lets it travel far into freshwater rivers.
- Guide context: estuary habitat in Global.
- Reported maximum length: 400 cm — a genuinely giant fish. 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 estuary habitat across Global. Tides mix fresh and salt water here, and sheltered shallows often serve as productive nursery habitat.
Behavior
Moves among ocean, estuary, and river habitats
Food-web connections
What it eats and why it matters
Diet
Fish, rays, sharks, and crustaceans.
Ecological role
Apex predator connecting marine and freshwater systems.
Remember
One fact worth keeping
Bull shark peut atteindre environ 400 cm et vit souvent près de Estuaire.
Think like a conservationist
A conservation lens
Estuaries are vulnerable to shoreline loss, polluted runoff, dredging, and barriers between nursery and adult habitat.
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 Bull shark 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