The lightning whelk, scientific name Sinistrofulgur perversum is an edible species of very large predatory sea snail or whelk, a marine gastropod mollusc in the family Busyconidae, the busycon whelks. This species has a left-handed or sinistral shell. It eats mostly bivalves.

There has been some disagreement about the correct scientific name for this species, which has been confused with Sinistrofulgur sinistrum Hollister, 1958, and Busycon contrarium (Conrad, 1840), which is an exclusively fossil species.

This marine species is native to southeastern North America, south to Florida and the Gulf states. Lightning whelks can be found in the sandy or muddy substrate of shallow embayments. This whelk species feeds primarily on marine bivalves, ingesting their soft parts using its proboscis.

For thousands of years Native Americans used these animals as food, and used their shells for tools, ornaments, containers and to make jewelry, i.e. shell gorgets. They may have believed the sinistral nature of the lightning whelk shell made it a sacred object. The lightning whelk is the State Shell of Texas.

Showing all 2 results

Show sidebar