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the ocean floor, E. parrae is often preyed upon by pencil urchins such as Calocidaris micans. The stomachs of C. mican collected around E. parrae contained large amounts of crinoid stems and soft tissue. In response to this, Endoxocrinus parrae have been observed detaching itself and using its cirri to move across the bottom of the ocean away from the predator. In addition, it is believed that the crinoids offer part of their stem up to the pencil urchin, allowing it time to flee while the urchin feeds.

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