What is the significance of gastropods and bivalve molluscs in nature and human life?

Bivalve molluscs are animals that ensure the purity of natural water bodies. Most species are filter feeders by the way they are fed. They suck in water containing organic and mineral particles and remove clean filtered water.
Pearl mussels are found in the northern rivers of our country. They give good pearls. The bivalve molluscs that live in the seas and oceans serve as excellent food for starfish, crabs, fish, seabirds and even walruses. Since time immemorial, people have been eating different types of bivalve molluscs: oysters, mussels, scallops.

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