Task: Translation
Input (English): Neptunea alexeyevi is a species of sea snail , a true gastropod mollusk in the Buccinidae family , the whelks navy .
Output (Chinese): 海王星（Neptunea alexeyevi）是一种海洋蜗牛，是一种真正的腹足动物软体动物，在海洋崽（Buccinidae）中。