A coastal salt marsh just northeast of the mouth of the Altamaha River. The trees on the horizon are on Sapelo Island. The grass covering the marsh is Spartina alterniflora, smooth cordgrass, which is adapted to live in the harsh environment of the salt marsh. Salt water covers the marsh twice each day during high tide, allowing shrimp, crabs and fish to swim onto the marsh looking for food or shelter. The tide also brings nutrients into the marsh, acting as fertilizer for the marsh grass. When the tide ebbs, it takes animals, nutrients, dead grass and other materials out of the marsh with it.

The posts visible in this marsh are part of a research project at the University of Georgia Marine Institute on Sapelo Island.