crustacean [crustaceans](arthropod of the subphylum Crustacea) noun [UK: krʌ.ˈsteɪʃ.n̩] [US: krʌ.ˈsteɪʃ.n̩]Crabs and shrimp are crustaceans. = I granchi e i gamberi sono crostacei.
shellfish [shellfishes](aquatic food that has a shell) noun [UK: ˈʃel.fɪʃ] [US: ˈʃel.fɪʃ]I don't like shellfish. = Non mi piacciono i crostacei.