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A knobbed whelk (Busycon carica) photographed against a neutral background — cream body with rows of blunt knobs along the shoulder.

Knobbed Whelk

A large right-handed whelk of the U.S. Atlantic coast, distinguished by pointed knobs along its shoulder — the state shell of Georgia and New Jersey.

How to identify a knobbed whelk

Aperture opens on the right when the spire points up. Row of blunt knobs along the shoulder of the body whorl; interior often flushed with orange.

  • Right-handed (dextral) coil
  • Prominent shoulder knobs
  • Orange-tinted aperture
Busyconidae
Gastropod
East Coast · Atlantic Coast
Sandy Intertidal · Shallow Subtidal
Fall · Winter · Spring
Intermediate

Common along Atlantic beaches from Cape Cod south to Florida — intact adult shells are less common than juveniles.

  • Never collect live specimens — check for a live animal in the aperture.

More shell reading to pair with the knobbed whelk

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