Animals of the phylum Echinodermata are:

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(B) The phylum $Echinodermata$ is characterized by the following features:$1$. They are exclusively marine animals.$2$. They possess an endoskeleton o

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Coelomate,spiny-skinned,marine

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(B) The phylum $Echinodermata$ is characterized by the following features:$1$. They are exclusively marine animals.$2$. They possess an endoskeleton of calcareous ossicles,which gives them a spiny-skinned appearance (the name $Echinodermata$ means 'spiny-skinned').$3$. They are triploblastic and coelomate animals.$4$. They exhibit radial symmetry in adults,while larvae show bilateral symmetry.Therefore,they are coelomate,spiny-skinned,and marine organisms.

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