Seaweed known was macroalgae are among the most important primary producers and act as ecological engineers on rocky coasts of the world’s oceans. They are primary producers, shelter, nursery grounds and food source for marine organisms. Seaweed are not only of high ecological, but also of great economic importance. The present study deals with the distribution of seaweed, during the sea shore survey conducted in the Manapad coastal region of Tuticorin district, Tamilnadu. During the study period, a total of 20 species of seaweed were recorded. Among them Sargassum sp., Padina sp., Gracilaria sp., Gelidium sp., Hypnea sp., and Amphiroa sp., were present throughout the study period.