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Cnidarians like jellyfish use muscles to contract their central bell, lightly propelling them through the water.

Coral polyps and sea anemones catch food in their tentacles. When the tentacle is full of food, it curls inward toward the mouth, which sucks up all the food.

Cnidarians who live in long strands in the open ocean coordinate their movement by feel. If you were a cnidarian and the cnidarian in front of you started to move left, then you would follow it left, and the one behind you would do the same. A lot of times, a larger, head cnidarian leads long strands of its friends through the water in search of food.

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11y ago
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10y ago

They have limited mobility, they mainly move with the current.

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11y ago

The nerve net.

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Q: What is the structure that coordinates the complex activities of a cnidarian's body?
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