The whelk family is a rather large and far-reaching family! It includes over 1500 species, and whelks are found in all seas from the Arctic, through the tropics and to the Antarctic. This means that on any given day our family can hope to find this family at the seashore.
The lightning whelk is a relatively common seashell which is native to the Atlantic coast of the United States from North Carolina to Florida and along the Gulf of Mexico to Texas. This predatory sea snail can be found in the sand from the near low tide line to water about 10 feet deep. They feed primarily on marine bivalves (clams, scallops, etc.).
Even though it’s a somewhat frequent event, finding an empty lightning whelk seashell is always a delight for us! We’ve been fortunate enough to find numerous perfect, uninhabited specimens of the lightning whelk along the Gulf Coast beaches from Florida to Texas. We have also left a whole passel of them behind on the sand because they were either still alive, or they had become comfy little condos for hermit crabs!
The Texas Parks and Wildlife Department says: “Lightning whelks reach a length of 2.5 to 16 inches (6 to 40 cm). Their distinguishing characteristics include their off-white to tan or gray shell with narrow, brown “lightning” streaks from the top of the shell to the bottom. The shell is white on the inside. The animal inside the shell is dark brown to black. Lightning whelks are unusual in that they have a counterclockwise shell spiral (lightning whelks are usually called “left handed”).” The related Perverse Whelk is also a “south paw” but has a heavier and stouter seashell.
“Like snails, the lightning whelk is in the class Gastropoda which means “stomach footed”. Gastropods are univalves (have only one shell). Hermit crabs often make homes of unoccupied lightning whelk shells. A lightning whelk leaves behind a trail when crawling. It is often easy to track them. The shell grows very quickly when the whelk is young as long as food is abundant. As it gets older, the shell grows more slowly. The color of the shell depends greatly on light, temperature and age. Older whelks have pale shells.” (TPWD)
In 1987, the treasured lightning whelk (Busycon perversum pulleyi) was appropriately honored by being designated the official state seashell of Texas. The Texas Parks and Wildlife Department has a short, interesting article covering many details of this beautiful sea creature including its life cycle, diet, and ways this gastropod has been utilized by man through the years.
From our family to your family: Happy Beachcombing!