Frilled Dogwhelk
Scientific Name: Nucella lamellosa
Category: shell
Brief Description
A medium-sized predatory sea snail with a thick, often textured spiral shell, common in the intertidal zones of the Pacific Northwest.
Characteristics
The shell is spindle-shaped with a pointed spire and typically reaches 2 to 4 inches in length. It can be smooth or have prominent axial ribs or frills (lamellae). Color varies widely from white and cream to orange, brown, or banded.
Habitat
Rocky intertidal zones, specifically the mid-to-lower tide levels where barnacles and mussels are present.
When to Find It
Visible year-round; often found in large clusters during winter and spring for spawning.
Conservation Status
N/A
Ecological Role
A key predator in the rocky intertidal ecosystem, they feed primarily on barnacles and mussels, helping to manage their populations and maintain biodiversity.
Easily Confused With
Channelled Dogwhelk (Nucella canaliculata) which has deeper grooves and lacks the axial frills, and Striped Dogwhelk (Nucella ostrina) which is generally smaller and found in higher intertidal zones.
Observation Tips
Look in crevices or under seaweed during low tide. They are often found near their yellow, vase-shaped egg capsules. Handle gently and return to the exact spot found.
Interesting Facts
This species is highly 'plastic' in its morphology; individuals living in areas with high crab predation often develop thicker shells and smaller openings for protection.
User Notes
Washington state beach