What Are The Good Effect Of Phylum Echinodermata To The Sea

What are the good effect of phylum echinodermata to the sea

Many echinoderms actually do have "spiny" skin, but others do not. This phylum exists exclusively in the sea, and cannot be found on land or in fresh water. All echinoderms have one thing in common: radial symmetry. ... The water vascular system within the body of the animal is also filled with sea water.


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