Atlantic Razor Clam (Jackknife Clam)
Phylum: Mollusca, Class: Bivalva, Order: Adapedonta, Family: Pharidae, Genus: Ensis, Species: Ensis leei · Pharidae (Razor Clams / Jackknife Clams) · Bivalve (fragment). Tubular / elongated shell valve segment.
Species
Ensis leei (formerly Ensis directus)
Shell Type
Bivalve (fragment). Tubular / elongated shell valve segment.
Family
Pharidae (Razor Clams / Jackknife Clams)
Size
Approximately 1.25 to 1.5 inches in length (3-4 cm) as shown in hand. Entire adult specimens typically reach 4 to 10 inches (10-25 cm), so this is a partial valve segment.
Color & Pattern
Off-white to yellowish-cream base color with distinct yellowish-tan to reddish-brown growth bands. The surface retains a thin layer of glossy tan periostracum along the shell margin.
Rarity
Very Common. Shell fragments are frequently washed up along the beaches of North Carolina, though complete unbroken valves are rarer due to their fragile nature.
Habitat
Inhabits shallow subtidal and intertidal zones in clean, fine sand or muddy-sand bottoms along ocean coasts, estuaries, and protected bays.
Geographic Range
Northwestern Atlantic Coast, ranging from Labrador, Canada south through North Carolina (including Oak Island) down to Florida.
Description
This specimen is a fragment of the elongate valve of an Atlantic Razor Clam. It features smooth, glossy surfaces with subtle curved growth lines and warm reddish-brown concentric coloration bands. The thin, straight, narrow profile is characteristic of the Jackknife clam family.
Key Features
Elongate, narrow, parallel-sided shape resembling an old-fashioned straight razor; smooth external surface with prominent concentric growth rings; glossy appearance.
Collector Value
Low commercial value ($0 - $2) as it is a partial beach fragment, but serves as a wonderful educational find and shoreline souvenir from Oak Island.
Condition Notes
Fragmentary / Partial Shell. The anterior and posterior ends are broken off. The color and periostracum remain reasonably intact and well-preserved. Condition Grade: Fair (due to fragmentation).
Interesting Facts
Razor clams are incredibly fast burrowers; using their muscular foot, they can dig into wet sand so rapidly that they easily evade predators and tidepoolers. They are named after their resemblance to a folding straight razor used for shaving.
Ecological Role
Infaunal filter-feeders that help purify water by consuming phytoplankton and organic particulates; they serve as a vital food source for shorebirds, crabs, bottom-feeding fish, and rays.
Similar Species
Stout Razor Clam (Tagelus plebeius) which is wider and flatter with more rounded ends, and the Green Jackknife Clam (Solen viridis) which is smaller and more vividly green-tinted.
Beach Finding Tips
Look along the wrack line at low tide on sandy beaches around Oak Island, especially after storms or strong onshore winds that wash up subtidal benthic debris.
Notes
Oak Island Nc