摘要：This research has been designed to study the length-weight relationship of Johnius belangerii of Arabian Sea in relation with fluoride concentration. The purpose of study to measure the variation in condition from expected weight for length as an indicator of pollution. The Total Length (TL) and Total Weight (TW) were measured for hundred fish specimen collected by net with fisherman. Least-square regression of log10 W x log10 TL produced the over all equation log W = -1.2681 +2.4486TL with the value of R2 = 0.4701. Using the exponential form of the slope and y- intercept, relative condition factor for the fish can be calculated as Kn = 0.7928 +2x10-3 TL (R2 = 0.0408) and Kn = 0.9824 7x10-6 TW (R2 = 4x10-6). Over all body condition of fish compared with condition ranges and growth in literature, showed the effect of concentration of fluoride on weight and length of fish. A statistically significant relation is observed in between fluoride concentration and condition.
