Hi again! It is called Aquaponics! When we talk about animals we call it Aquaculture and about plants we call it Hydroponics! Try to google it 😉 This is the wikipedia link http://en.wikipedia.org/wiki/Aquaponics ….it is really impressive and now a lot of things are grown like this already! Also, you don’t need to use huge areas of soil, since you can just grow things at different heights! You can even grow plants and animals in the same system, making a great use of resources!