crus·ta·cean
noun/krʌˈsteɪʃn/
/krʌˈsteɪʃn/
(specialist)- any creature with a soft body that is divided into sections, and a hard outer shell. Most crustaceans live in water. Crabs, lobsters and shrimps are all crustaceans.
enlarge image任何具有分为多个部分的柔软身体和坚硬外壳的生物。大多数甲壳类动物生活在水中。螃蟹、龙虾和虾都是甲壳类动物。