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Eelgrass (Zostera marina) is the primary type of seagrass found along the Sanctuary coast, including in Tomales Bay. Eelgrass beds provide an important habitat for numerous fish (including commercially-important Pacific herring, rockfish, and salmon) invertebrates, and seabirds as food, shelter, and important spawning and nursing grounds; as well as other ecosystem services including increasing water quality by trapping sediments and reducing excess nutrients and pollutants in the water column, preventing coastal erosion by buffering the impacts of wave energy and storms, and sequestering carbon. Learn how the Sanctuary works to protect this important seagrass habitat, and how you can help.