crustacean

n any of various types of animal (eg crabs, lobsters, shrimps) that have a hard outer shell and live mostly in water; shellfish 甲壳纲动物（如蟹、 虾）; 贝类.

cruise missile, cruiser, crumb, crumble, crumbling, crumbly, crumbs, crummy, crumpet, crumple, crunch, crunchy, crupper, crusade, crusader, crush, crush barrier, crushing, crushingly, crust, crusty, crutch, crux, cry, cry down, cry for, cry off, cry out, cry-baby, crybaby, crying, cryogenic, cryogenics, crypt, crypt(o)-, cryptic, cryptically, cryptogam, cryptogram, crystal,