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A large knobbed whelk shell resting on shell-strewn sand at sunset, with dune grasses in the distance and shimmering surf rolling in beside it.

Whelk

A group of large predatory sea snails found along the U.S. east and gulf coasts, including knobbed, channelled, and lightning whelks.

How to identify a whelk

Spiralled shells with a prominent siphonal canal. Coil direction (left vs. right handed) and shoulder ornament separate the common species.

  • Large spiralled shell with a tall spire and long, open siphonal canal running down the base.
  • Shoulder is often ornamented with knobs, spines, or blunt tubercles depending on species.
  • Aperture is broad and pear-shaped, typically cream to pale orange inside.
  • Coil direction is diagnostic — most whelks coil to the right; the lightning whelk coils left.
Busyconidae / Buccinidae
Gastropod
East Coast · Gulf Coast
Sandy Intertidal · Grass Flats · Shallow Subtidal
Beginner

More shell reading to pair with the whelk

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