🌊 How Do Crabs Breathe?
Crabs are animals that live mostly in water, but some can also live on land. To survive, they need a way to get oxygen.
Crabs’ Breathing System
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Crabs breathe using gills, just like fish.
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The gills are soft, feathery organs that take oxygen from water and remove carbon dioxide.
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Gills are located in a chamber under the crab’s shell, near the legs.
In Water
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When the crab is underwater, water flows over its gills.
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Oxygen in the water moves into the crab’s blood.
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Carbon dioxide moves out into the water.
On Land
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Some crabs (like land crabs) can also live outside water.
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Their gills must stay moist to work, so they can still absorb oxygen from the air.
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That’s why land crabs often stay near water or damp places to keep their gills wet.
Example
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Marine crabs (sea crabs) → mostly use water to breathe.
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Land crabs → can breathe in air, but only if their gills stay moist.
✅ Summary:
Crabs breathe with gills. In water, they take oxygen directly. On land, they can still breathe air, but their gills must stay wet.
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