Before urbanization, Mission Bay was nestled inside of a +500 acre salt marsh and lagoon, and was occupied by year-round tidal waters. This area was a natural habitat and refuge for large water fowl populations that included ducks, geese, herons, egrets, ospreys and gulls. The Native American tribes who resided in this area were the Costanoan people who spoke eight different languages which delineated between the various tribelets. The tribe most prevalent in the Bay area was the Patwin people who resided in the area for over 5,000 years.