Aquaponics = AQUAculture (fish farming) + hydroPONICS (growing produce)
From the ECF website:
"In ECF aquaponic farming systems, the process of both rearing fish and growing vegetables operates as a fully integrated and complementary system. The combined processes of controlled nutrient fluxes and CO2 exchange, rainwater and waste heat recovery, in-house fertilizer production partnered with the optional use of photovoltaic in heat and electricity production, lead to a better ecological and economic balance."
More on ECF here.