Along the coasts, bordering the oceans and seas of the world extend vast underwater prairies of seagrasses. Seagrasses are flowering plants of terrestrial origin and form extensive meadows in intertidal and shallow subtidal zones. They deliver multiple benefits to the marine environment and the human communities that depend on the sea for their living. Despite increasing recognition as one of the most economically and ecologically valuable ecosystems on Earth, very little is known about the location and state of seagrasses on the west coast of Africa. Very few publications are available for the whole region and there appears to be limited awareness of the existence and importance of seagrass meadows.