How to Use "echinoderm" with Example Sentences

1. “ echinoid : an echinoderm of the class Echinoidea , which includes the sand dollars and sea urchins . ”

2. echinoderm having a flexible sausage-shaped body , tentacles surrounding the mouth and tube feet ; free-living mud feeders : sea cucumbers .

3. The echinoderm biomass in this area ( 6.18g / m ~ 2 ) is higher than that in the South China Sea and the East China Sea .