Lengh-weight rerationship, relative condition factor, food, growth, maturity, fecundity, breeding, mortality and exploitation of Plotosus lineatus (Thunberg) from Visakhapatnam waters were studied. The fish attained maturity at .I59 mm total length and has a longevity of 2.19.years. The total mortality and fishing mortality were estimlted as 23102 and 0.6462 respectively. The exploitation ratio, E = 0.2797 and exploitation rate, U = 0.2520 indicated underexploited state of the stock.

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