The Indian sand whiting, Sillago sihama, occurring in the estuaries of Karnataka along the southwest coast of India was found to attain a mean length of 17.1,25.2,29.2 and 31.1 cm at the end of 1-4 years respectively. From the length-converted catch curve, the total fishing mortality Z was estimated as 3.79 year-' whereas from Jones and van Zalinge method Z was estimated to be 3.28. The natural mortality M was estimated to be 1.41 which gave F = 2.38. The exploitation rate E = 0.63 gave an indication that S. sihama fishery is facing moderately higher fishing pressure in these estuaries. lc was estimated as 14.45 cm, Im=16.5c m and lop 20t.=7c m. The length-weight' relationship was found to be W = 0.02471 L^2.56. Wm was estimated as 197g. The life span of the species is around 4.22 years. A note on the spawning season and recruitment pattern is also included in this paper.