During the survey carried out for inventorying the marine and estuarine biodiversity of coastal Karnataka for the Karnataka Biodiversity Board in December 2005, considerable populations of thin bladed grass species were collected from Kundapur (13.64306 ºN & 74.6586 ºE) and Mavinahole (13.9833 ºN & 74.5616 ºE) estuaries as well as from the intertidal areas of Devgad Island (14.8225 ºN & 74.0644 ºE) and these were later identified as Ruppia maritima L popularly known as beaked tassel-weed.