Synopsis The climbing perch. Anabas testudineus (Bloch) commonly known as Kawai is a well known air breathing food fish of North Bihar (India), which generally inhabits the freshwaters and brackishwaters of North Bihar, West Bengal, Assam of India and Bangla Desh and other South Eastern Asian Countries. The present book deals how the various abiotic factors such as seasonal temperature, photo-period and salinity and biotic factors like density of the animals affect the growth of the juvenile and adult Anabas testudineus. Bioenergetics of this fish have also been dealt with in detail.