This document provides an overview of aquaponics, which is a sustainable food production system that combines aquaculture and hydroponics. It discusses the key components of aquaponics systems - fish, plants, and water. Fish waste provides nutrients for plants grown hydroponically, and the plants help filter the water for the fish. The document includes various web links as sources for more information on aquaponics components like different system types, suitable fish and plant choices, water filtration and aeration, and examples of small backyard aquaponics systems.