Sentence 1: Neptunea alexeyevi is a species of sea snail , a true gastropod mollusk in the Buccinidae family , the whelks navy .
Sentence 2: Neptunea alexeyevi is a species of sea snail , a marine gastropod mollusk in the Buccinidae family , the true pustules .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?