shellfish
n (pl unchanged 复数不变)
(a) [C] type of water animal with a shell, esp one of the edible types, eg oysters, mussels, crabs and shrimps 水生有壳动物(如牡蛎、 贻贝、 蟹及虾等可食用者).
(b) [U] such animals as food (作食物用的)水生有壳动物
I eat lots of shellfish. 我常吃虾、 蟹及贝类食物.