The knobbed whelk, Busycon carica, is a species of very large predatory sea snail, or in the USA, a whelk, a marine gastropod mollusk in the family Buccinidae, the busycon whelks.
The knobbed whelk is the second largest species of busycon whelk, ranging in size up to 12 in (305 mm).
Read more about Knobbed Whelk: Distribution, Shell Description, Life Habits, Reproduction, Human Use