Our beaches in BC are full of life, and new life. A little known fact is that dozens of species spawn on our beaches, some all year, some in seasons. When you see a lot of seagulls, diving and feeding, something is happening. Stop an see the beginning of new life cycles.
Later this season I will take pictures and try to describe the spawning and frantic feeding activity on Davies Bay beach. As far as I remember, some spawn at the full moon and high tides in August, and a few dedicated fishermen are out there with gear catching them for food.
http://icb.oxfordjournals.org/content/41/3/526.full Article on beach spawning fishes
http://westvanshoreline.ca/history/index. West Vancouver Shoreline Conservation Society
http://en.wikipedia.org/wiki/Wreck_Beach Smelt spawn on popular nude beach
A list of all species etc.