Atlantic Razor Clam

Ensis leei · Also known as: jackknife clam, razor clam, Ensis directus

Long, straight “jackknife” shells of Mid-Atlantic sands. Fast diggers that leave rectangular siphon shows on flats.

Atlantic Razor Clam (Ensis leei) — Ocean City, Maryland
Photo via Wikipedia / Wikimedia Commons — Atlantic jackknife clam

Quick facts

GroupBivalve
Likelihood nearby★★★☆☆
Habitats Ocean beach, Coastal bays, Inlet, Assateague State Park, Assateague National Seashore
Seasons (this coast)year-round

How to recognize them

  • Elongated, nearly parallel-sided shells that look like an old straight razor.
  • Olive-brown periostracum when fresh; brittle white valves when worn.

Biology notes

  • Extremely fast burrowers; filter-feeders of sandy intertidal and shallow subtidal flats.
  • Taxonomy updated—many guides still list older name Ensis directus.

Where to see them around Ocean City

  • Bay and inlet sand flats at extreme low tides; Assateague and mainland coastal bay edges.
  • Empty shells common on ocean beaches after storms.

When to look

  • Best live viewing on spring low tides; shells year-round.

Viewing tips & etiquette

  • If you see a show, dig quickly—razors vanish deep in seconds.

Sources & further reading