Pacific Spiny Dogfish Shark: <i>Squalus Acanthias</i> (IMAGE) University of British Columbia 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 License Licensed content 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.