What is the significance of crustaceans in nature and human life?

Numerous crustaceans serve as food for fish. Crustaceans are the main food of the sea giants – toothless whales. Eating a huge number of dead aquatic animals, crustaceans thereby cleanse reservoirs.
Many crustaceans are eaten by humans. The fishery for shrimp, crabs, lobsters, lobsters is developed in our country and many other countries. In fish hatcheries, some species of crustaceans are bred as feed for young fish.

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