Herring continued to spawn last week along the San Francisco Waterfront extending from Pier 70 to the Ferry Building. This provided an excellent opportunity for wildlife watchers to see the frenzy of feeding activity up close. A smaller spawn was also detected in Richardson Bay in the main anchorage area. As of Friday this week a new school was building in the North Bay. In past years a spawn usually comes to the Marin County shoreline around this time of the season but only the herring know where they will end up next.