Threespine Sticklebacks can be found in the waters off the North Shore. Pretty easily identifiable with their three spines in front of the dorsal fin, they usually stay in the shallow water and feed on small crustaceans and larvae. Threespine Sticklebacks are relatively small, they can grow up to about 11 cm in the sea. Birds are major predators of these Sticklebacks, while Sticklebacks are predators of small crustaceans and insects.
Information from E-Fauna BC: https://linnet.geog.ubc.ca/efauna/Atlas/Atlas.aspx?sciname=Gasterosteus%20aculeatus & https://www.pugetsound.edu/academics/academic-resources/slater-museum/exhibits/marine-panel/three-spined-stickleback/