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rib-shaped bones
have either an external shell in which the animal lives in the last chamber or an internal shell that is linearly chambered or reduced in size
Our artists captured every detail of this attention-demanding beast
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Crinoid Composit Mortality Plate, 7 Species Tyrannosaurus Rex rib-shaped bonesCrinoids, also known as sea lilies, are ocean creatures that live attached to the sea floor. They have three main body parts: the stem which attaches to the sea floor, the calyx (or head) which contains the mouth parts and internal organs, and the arms which filter the food particles out of the water. Crinoids are animals despite their plant like appearance. They belong to the phylum Echinodermata, meaning "spiny skin." Other current day examples of