Seagrasses are submerged flowering monocot green plants and are primary producers of food for numerous marine animals. Seagrasses are of worldwide distribution, encountered at the lower intertidal zone and may be found at lower depths if the seawater is clear. Worldwide, the number of seagrass were estimated to be approximately 60–72. It is now evident that the number of seagrasses is almost 200 species comprising 25 genera and 5 families. Of these, 10 are on the Red List, counted as risking extinction, of which 3 are considered as endangered. The Western Indo-Pacific realm encompasses 13 species in 2 families: the Cymodoceaceae with 4 genera and the Hydrocharitaceae with 3 genera. Twelve (12) species extend into the Red Sea; 4 occur in the Arabian/Persian Gulf and 4 in the Arabian Sea. The overall distribution and abundance of seagrasses worldwide is little known and much so in the Gulf.