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Echinoderms are common on the ocean bottom because in the deep sea they easily make up the bulk of living material they need. They may be grazers (most sea urchins), feeders on small particles (many brittle stars), or predators (most starfish).

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14y ago
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15y ago

well i think they do because aqll the pictures of them show them at the bottom of corral

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15y ago

Because it has no skeleton to support it's body on land. It would just be all squishy and probably have about three people standing around it poking it with sticks.

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14y ago

so the octopuses they can eat and the body was only olowded in water

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13y ago

Because their sea-creatures. That's why they are SEA-creatures. Get it.

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11y ago

They are anatomically adapted to live in the ocean.

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9y ago

If there are lots of fish in the Ocean,it would accidentally eat a lot of fish so that we don't have fish to eat.

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13y ago

Because all there food is there!

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Q: Why do sharks live at the bottom of the ocean?
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