If you consider establishing an aquaponics system, one of the critical decisions you will need to make is what fish species to stock it with. Fish plays an essential role in an aquaponics system because fish wastes are used as the nutrients for the plants to grow. Aquaponics is a symbiotic environment where both the plants and fish benefit from each other. So it is essential that you choose the right fish for your aquaponics system for your plants to grow healthy. In selecting the best fish species to raise in your aquaponics system, there are several important factors that you have to consider because not all fish are suitable for aquaponics.