Aquaponics is a splendid example of a blended pair of dual sustaining symbiotic systems!
In other words we have what might be two separate farm systems, plant, fruits, vegetables crops and we have a fishery. Each of these two aspects requires a number of products to flourish but when combined into an aquaponics system, they complement each other, provide the nutrients and other resources needed to sustain the other.
We pair 1. growing many normal crops with 2. fish farming. These two areas integrate to become a single self sustaining, symbiotic, resource conservative system.