crustaceans

crustaceans — 名詞

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

1.名詞B1
釋義

甲殼類

有硬殼、主要生活在水中

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.

Kimiko 在退潮時發現岩石下藏著幾隻小型甲殼動物。

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.

生物老師向全班示範甲殼類動物（如螃蟹）如何脫去舊殼長出新殼。

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.