The practice of keeping ornamental fish at home was a mere hobby of some rich people even a decade back. However, recently numerous researches have proved these beautiful fishes to have positive impact on mental and stress related problems of human. Unfortunately, this highly valued ornamental fish industry is facing difficulty to prosper because of scarcity of protein rich diets. Hence alternative protein supplement is being explored worldwide. In this context the present book explores how grasshoppers could be exploited as a protein rich supplement for the common ornamental fish black molly.