The Gharial, Gavialis gangeticus, is a specialized fish-eating crocodilian, endemic to Indian subcontinent, and was of paramount concern to the Government of India in 1974. In 1975 India launched projects for the conservation of Indian crocodilians with support of the FAO and UNDP. Research to develop knowledge on biology and field techniques to help ex-situ and in-situ management, as described in this book, is a classic example where research led to success in conservation. This book contains data on ecology, reproduction, food, feeding habits, food conversion, behaviour, disease and captive management of Gharial. It describes the phenomenon of egg space economy and post-hatching growth priority that resulted in the morphometrics for life in perennial rivers. The book is based on author’s PhD dissertation Ecological Studies on the Indian Gharial Gavialis gangeticus (Gmelin) (Reptilia, Crocodilia).