mollusks
mollusks — noun
1. a type of animal with a soft body and no backbone, whose body is often protected
a type of animal with a soft body and no backbone, whose body is often protected by a hard outer shell. Mollusks include snails, clams, octopuses, and slugs, and most live in water.
Mark pointed to a clam and said that all mollusks have soft bodies without bones.
that-clause for stating a general fact about a group
Ife found a pink-striped mollusk shell while walking on the beach.
Asher drew a diagram showing that squids, snails, and octopuses are all mollusks.
The marine biology team studied how mollusks use their muscular foot to move across rocks.
Yara lifted the tiny mollusk off the aquarium glass and placed it in a bucket.
- shellfish
refers specifically to edible mollusks with shells (clams, oysters, mussels) and some crustaceans; narrower and used in food contexts
- invertebrate
a much broader category that includes insects, worms, jellyfish, and all animals without a backbone, not just mollusks
- vertebrate
animals that DO have a backbone — the opposite biological category
文法句型
mollusk + verb (plural agreement)
mollusk + shell / species / habitat
用法筆記
Frequently used in the plural form when referring to the group as a whole. The singular 'mollusk' is used for one individual animal.