Book excerpt: In today's world, food scarcity and food security are significant global concerns, with 811 million people suffering from hunger and 3 billion individuals unable to afford healthy diets. This book discusses fisheries and aquaculture as crucial contributors to nutritional security and the need for sustainable practices to meet the growing demand. The subject matter of this book covers: Recycling of Waste Through Tubifex Culture and Used as Live Food in Aquahatcheries Culture Techniques of Daphnia Mosquito Larval Control Through the Larvivorous Fish Chlorella Live Food: Cultivation and Applications Print edition not for sale in South Asia (India, Sri Lanka, Nepal, Bangladesh, Pakistan and Bhutan)