This treatise gives an up-to-date comprehensive account of the seed production technology of major species of fin fish and shell fish utilized for commercial aquaculture. Though copious illustrations in the text provides an orientation towards the students reader, the book shall be a valuable reference material not only for students but also for teachers, scientists, extension workers and planners. This book is perhaps the first of its kind as no single text book deals with such wide ranging species and technologies on the subject-the break through that has revolutionised aquacultural practices in the world. Hence this text book shall be a must for all those concerned with aquaculture particularly with reproduction and seed production of fishes.