Crustacean Biology

noun a hard shell covering the back of certain animals such as turtles and crustaceans

• The turtle's carapace provides protection from predators.
• Check out the cool pattern on that turtle's shell!
• That turtle's got a pretty sweet armor.
• She retreated into her emotional carapace to shield herself from criticism.

noun either of a pair of mouthparts in insects and other arthropods that are usually used for biting and crushing food

• The insect uses its mandibles to grasp and chew its food.
• Check out the size of that beetle's mandibles!
• Those mandibles are no joke, they can crush anything in their path.
• Her sharp words were like mandibles, cutting through the conversation with precision.