Why aeroplanes, many aquatic animals and submarine has a special shape?
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Aquatic animals live in the water and depend on it for survival. There are various groups of aquatic animals including fish, mammals (whales), mollusks (sea snails), cnidarians (jellyfish), and crustaceans (crabs). They either live in fresh water or salt water and can be either vertebrates or invertebrates.
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the special shape ( airodynamic) helps them to move easily,smoothly and quicker as it
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