Bandal trap is used for catching:

Correct option is C

Correct Answer: (c) Hilsa
Explanation:
→ Bandal traps are traditional coastal/estuarine gear designed to intercept migratory hilsa (Tenualosa ilisha) during upriver/estuary movements.
→ The trap geometry exploits current/ migration routes to concentrate schooling hilsa.
Information Booster:
→ Hilsa fisheries depend on seasonal run timing and gear like bandal traps, stake nets and gill nets in Indo-Gangetic estuaries.
Additional Information (Other Options):
(a),(b),(d): Different species requiring other gear types (e.g., culture/pond catch for Pangasius; purse seines, gill nets for Chanos; trawls for Bombay duck).