Banded Tulip Snails. Fairly common in the Carolinas, the Banded Tulip can reach 4 ½ inches in length with 7 distinct brown lines on its main whorl. The less common True Tulip is a much larger snail, reaching up to 10 inches in length, with 15 faint brown lines on its main whorl. Tulips prey on other mollusks, including other Tulips, by boring a hole through the shell.