Sandy Point (S.C.) Stop 3 - Clench's Helmet, Knobbed Whelk, And Lightning Whelk - Episode 6

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Clench’s Helmet is a univalve which feeds on echinoderms, like sand dollars. We see two shells which look very similar to each other, but actually come from different animals: a Knobbed whelk, and a Lightning whelk. 

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