What are the characteristics of animals without backbones?
Groups of invertebrates: echinoderms, molluscs, arthropods, cnidarians, molluscs, sponges.
Some of them have an external skeleton.
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Others have an internal skeleton.
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Some live attached to the seabed.
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Some invertebrates have many legs.
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Some look like an umbrella.
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One group has a soft body with no legs.
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Their body is protected with one shell.
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Some of them have a long tail.
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They have scales.
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Their body is covered with fur.
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