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Because brittle stars are very fragile. Interestingly, Brittle stars use this fragility to defend themselves by easily losing arm segments or even entire arms. This strategy works because they are also able to regenerate these lost parts. They use their brittle quality and regenerative powers, in a way similar to that of some lizards, who lose part of their tails to confuse, appease, and evade predators.

Brittle stars, Ophiuroids, are echinoderms, closely related to basket stars and distantly to star fish, sand dollars, and urchins.

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15y ago

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