Echinoderms are exclusively marine with an organ-system level of organization, exhibiting radial symmetry as adults and bilateral symmetry as larvae; they are triploblastic and coelomate.
All are marine in phylum echinodermata with organ-system level of organisation. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical. They are triplo-blastic and coelo-mate animals.
| Text | All are marine in phylum echinodermata with organ-system level of organisation. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical. They are triploblastic and coelomate animals. |
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