Knobbed Whelk
Busycon carica · Also known as: lightning whelk look-alike, knobby conch
Heavy, knobby Mid-Atlantic whelk. Another big shell on Assateague beaches and a clam predator of the bays.
Quick facts
| Group | Gastropod / snail |
|---|---|
| Likelihood nearby | ★★★★☆ |
| Habitats | Ocean beach, Coastal bays, Inlet, Assateague State Park, Assateague National Seashore |
| Seasons (this coast) | year-round |
How to recognize them
- Thick shell with prominent knobs on the shoulder; usually right-handed (dextral) coil.
- Larger and lumpier than the smoother channeled whelk.
Biology notes
- Predatory gastropod of sandy and muddy bottoms; feeds on bivalves.
- Produces similar coin-string egg cases that wash onto barrier beaches.
Where to see them around Ocean City
- Assateague and Ocean City beaches in the wrack line.
- Bay and nearshore bottoms—more often found as empty shells than live animals by walkers.
When to look
- Year-round shell finds; storm peaks improve odds.
Viewing tips & etiquette
- Compare knobs vs. the channel groove to tell knobbed from channeled whelks.
