Recently, the International Union for Conservation of Nature (IUCN) has announced that over half of molluscs are threatened by deep-sea mining.
About Molluscs:
Molluscs are extremely diverse invertebrate animals.
Habitat: They are found in nearly all freshwater and marine environments, and some are found also on land.
They come in all shapes and sizes, and some of them grow external shells to protect their soft bodies.
These are a quarter of all living marine species and also have importance as food sources.
The molluscs include many familiar animals, including clams, snails, slugs, and squid, as well as some less familiar animals, like tusk shells and chitons.
Major groups within the Mollusca
Polyplacophora: It consists of chitons, snail-like molluscs with eight-part overlapping scale shells
Gastropoda: These are true snails and slugs. They represent the most diverse class within phylum Mollusca with 60,000 to 80,000 extant species in marine, freshwater, and terrestrial habitats.
Bivalvia: These are molluscs with hinged two-part shells. Examples include clams, oysters, mussels, and scallops.
Cephalopoda: These are molluscs with large heads, large eyes, and grasping tentacles
Examples include octopus, squid, cuttlefish, and nautiloids.
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