Pacific Spiny Dogfish Shark: Squalus Acanthias (image) University of British Columbia Share Print E-Mail Caption The Pacific spiny dogfish is one of the most common species of sharks in the northern Pacific. Credit By Doug Costa, NOAA/SBNMS. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.