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| sand dollar |
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| sea cucumber |
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| sea urchin |
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| star fish |
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| brittle star |
- They all have 5 part if their is more than something is wrong with them.
- Echinoderms tentacles like structures like tube feet.
- They have no brain,heart or eyes.
- Their mouth is on the back side.
- They have to live in the water or they will die.
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