Mollusks

Molluscs

Mollusks mostly live in the water, but not always: land-based snails and slugs are Mollusks, too.

Mollusks are invertebrates, meaning they have no backbones. Their soft bodies are "single segments" -- all one piece. If you wonder whether this is true of an octopus, because surely that has "legs" that are a distinct part of their body, they are actually all one part of the same body, sort of like gloop dripping through your fingers -- there are no joints.

Most Mollusks secrete calcium carbonate to make shells that will outlive them for quite a while.

There are three types of Mollusks: bivalves, cephalopods and gastropods.

Bivalves includes things with two shells, such as oysters, cockles, mussels and clams;
Cephalopods include octopus, squid and cuttlefish. They have no skeleton nor any shells;
Gastropods include snails, both land and sea, limpets and whelks.

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Also called:

Phylum Mollusca (Scientific Name); Mollusques (French); Weichtiere (German); Molluschi (Italian); Moluscos (Spanish)

Other entries for: Mollusks
Abalone, Mollusks

Other entries for: Seafood
Octopus, Squid