Of little importance in a city-dwelling society in which much knowledge
and skills have been lost, well as access within tribal territory.
Among food sources important to Indians were riverine molluscs. Meat
can be extracted from large ones, small ones make a delicissous and
nutritious soup when shells are boiled. Often some sand in the soup.
Spanish raise Blue mussels on ropes suspended off bottom of estuarine or
salt water---presto, no sand.