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They are radially symmetrical, there is no cephalization ( no heads ) and they are, like you deuterostomes. ( indeterminate cleavage and a mouth that does not arise from the blasophore ).

Also, they are all marine animals and they have spiny skin.

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11y ago
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12y ago

Invertebrate animals with spikes and spines all over their bodies.

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10y ago

They have a spiny back and they eat particles in the water plus they have most color and they don't walk with two legs they have one.(:

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10y ago

ny

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Q: What characteristics do all echinoderms have in common?
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