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The net, among the fishing gear occupies the prime position in catching fish commercially for mass production. Among the net, trawl net chase the fish to be caught, as such, has established itself as the most important gear throughout the world oceans. With these objectives, the book in its nineteen chapters, not only, outlined the features of the trawl net, but described the operational characteristics of the net in different operating conditions.. Starting with the principles of the design and construction of the net, the evolution of various trawl fishing gears, tested on trials over time series, from the conventional two seam trawl to four and six seam trawls with overhang, bulged belly, long wing, large mesh, tested for operation at different depths were elaborately described in different chapters of the book. The incorporation of By catch Reduction Devices, a new innovation adopted as conservation measures together with the common by catch species encountered in Indian Seas have