Why is seagrass important?

Seagrasses are only lightly grazed in temperate waters, and the organic matter produced by them enters a detrital food chain. The most obvious role of seagrasses is as part of a structural habitat. The seagrass blades protect juvenile and small adult fish, and invertebrates such as prawns and crabs, from predators such as large fish. The leaves and upright stems of seagrasses also act as baffles to water currents; this can cause suspended particles to be deposited. To summarise, seagrasses can: