When you see bags of seashells in the store for vase filler or crafting use, or lots of giant almost-perfect shell specimens for sale, don't purchase them. As nautical design continues to gain popularity, these shells aren't collected carefully or by hand. They are often dragged out of the ocean by trawlers or nets, which pick up large numbers of shells off the ocean floor. They also pick up other aquatic wildlife, killing them in the process. Admire shells at the beach, and think of a new design aesthetic.