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The mandibles on a crab scoop food into its mouth. In most species they are hard-shelled and can scrape or slice into edible materials. Crabs do not chew their food, so the mandibles separate it into small parts.

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13y ago
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10y ago

Crabs and other arthropods use maxillae, along with other mouthparts like mandibles, to assist in preparation of food prior to ingestion. Maxillae tend to be used to hold and taste food along with mandibles used for tearing and chewing. In crabs, extensions of the maxillae process expand into the gill bailer, and thus have a significant involvement with breathing.

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14y ago

the mandible of a crayfish is used to grind food.

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12y ago

The mandible is used to capture and hold prey.

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Q: What does the mandible do on a crayfish?
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