Whidbey Island Beachwatchers
 

Intertidal Organisms EZ-ID GUIDES

 

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Nucella ostrina (Northern striped dogwinkle)

photo of emarginate dogwinkle
Copyright © 2005 Mary Jo Adams

 

Nucella ostrina is one of two common whelk species found on our beaches. They are found at the middle intertidal level where it is rocky and inhabited by mussels and barnacles, their preferred prey. The adult animals are about an inch high with alternating heavy and delicate spiral ribs. In Seashore Life of the Northern Pacific Coast, Dr. Kozloff tells us, "Heavier ribs alternate with more delicate ones". The ribs are often white with yellow, orange, brown, or black coloration in the furrows between them.

If you find what looks like a clump of yellow oats under a rock overhang, they may be whelk eggs.

This species was formerly known as Nucella emarginata.

 

This page was created by Mary Jo Adams on 11/2/05.

 

 

photo of emarginate dogwinkle

photo of emarginate dogwinkle

 

photo of emarginate dogwinkle with egg cases