Food composition in relation to size of fish: The percentage composition of food items found in different size groups of S. canaliculatus pooled for 2005-06 and 2006-07 showed that the volume of seaweeds increased from 15.4% in 17-18 cm fish to 54.7% in 25-26 cm size group (Fig. 4). While the share of seagrass was moderate, benthic invertebrates were found in larger size groups between 26-27 cm and 33-34 cm. Semidigested food was found in all the size groups