Which of the following is known as sea lice?

Correct option is C

Correct Answer: (c) Caligus sp.
Explanation:
→ Caligus species are marine ectoparasites called sea lice, affecting salmonids and many marine fishes.
→ They attach to skin and feed on mucus, tissue, and blood.
Information Booster:
→ Major problem in marine aquaculture (salmon farming).
→ Causes lesions, stress, secondary infections.
→ Control involves medicinal baths and cleaner fish.
Additional Information:
(a) Argulus – freshwater louse.