Echinoderms, Sea Star, sea cucumber, sand dollar, sea urchin, tube feet, radial symmetry, name means spiny skin, no head or brain, have arms that extend from the middle body, Mollusks, octopus, scratchy tonguelike organ called radula, squid, more complex, snail, conch, gastropods, scallop, most have a shell or mantle, breathe with lungs or gills, slug, soft body, muscular foot

Echinoderms & Mollusks

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