crustaceans

crustaceans — noun

1. A group of animals with hard, jointed outer shells that live mainly in water, in

1.名詞B1
釋義

A group of animals with hard, jointed outer shells that live mainly in water, including crabs, lobsters, shrimp, and barnacles.

例句

Kimiko found several small crustaceans hiding under the rocks at low tide.

countable noun, usually plural — 'several small crustaceans'

The biology teacher showed the class how crustaceans like crabs grow new shells after shedding the old ones.

prepositional phrase: 'crustaceans like [examples]'

同義詞
  • shellfish

    Broader term that includes crustaceans (crabs, shrimp) plus mollusks (clams, oysters). 'Shellfish' is more common in everyday cooking and eating contexts.

用法筆記

This word is most often used in the plural form (crustaceans) when referring to the group as a whole. The singular form 'crustacean' is used when talking about one individual animal.

常見錯誤

❌Crustaceans are a type of fish with scales.
✅Crustaceans are animals with hard outer shells, like crabs and lobsters.
💡Crustaceans are not fish; they belong to a different animal group (arthropods).
❌I ate a crustaceans for dinner.
✅I ate a crustacean for dinner.
💡When talking about one animal, use the singular 'crustacean' without the -s.