Q. Hilsa and mackerel are varieties of

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Solution:

Saltwater fish, also called marine fish, are fish that live in ocean water. Fishes that live in the ocean can be carnivores, herbivores, or omnivores. These fishes are rich in fatty acids.
Common edible freshwater fishes 1. Catla 2. Common carp 3. Rohu
Common edible marine fishes 1. Hilsa 2. Sardines 3. Mackerel 4. Pomfrets