The fleshy-stemmed glassworts and saltworts colonize these salt pans. Also look for widgeon grass in the more permanent pools. Farther back still is an area only affected by salt spray. The dominant theme in all salt marsh life is the regular waxing and waning of tides. These highest tides cover even the upper marsh.
All marsh life is adapted to the twice daily tide cycle.
Birds that dine on the snails use the shells to help grind up food in their stomach.