Eelgrass is a keystone species

The subtidal zone is a coastal region that is consistently submerged under water, encompassing nearshore and offshore regions. It's a more stable environment than the intertidal zone, offering less exposure to air, drastic temperature fluctuations, and sunlight variations. Subtidal communities are diverse, including kelp forests, seagrass beds, and coral reefs found in shallower areas, while deeper regions are dominated by phytoplankton. 
RSFB is proposing the establishment of sustainable Zostera marina eelgrass meadows by identifying appropriate areas within OLU28 that provide the ideal conditions for sustained growth. 

​Eelgrass beds are crucial for marine ecosystems and coastal protection. They provide essential habitat, shelter, and nursery grounds for a wide variety of fish, invertebrates, and birds. Eelgrass also helps stabilize sediments, reducing erosion and improving water quality.  The goal is to identify innovative and cost-effective seeding methods such as the use of naturalized manila clams with native eelgrass seeds glued onto their shells and disbursed within the desired growth areas.

Image Source: San Francisco Bay Subtidal Habitat Goals Report. 2010