This book on “Earning Animals” is written with a view to highlight the importance of some invertebrate and vertebrate species used for earning both at individual and national levels. It aims at creating awareness among students, entrepreneurs and unemployed youth for gainful employment. The candidate species selected are some useful annelids, arthropods, unio, fish and mammals. A chapter on aquaponics – a method of cultivation of fish and plant farming devoid of soil – has also been described. Since most of these animal species are included in the syllabi of Indian Universities and colleges, the authors believe this book will be helpful to the students to meet their curricular requirements.