Can you explain aquaculture and fisheries to me?

Image by eutrophication&hypoxia
China constitutes nearly 62% of the global marine aquaculture industry. Between 1990 and 2008, marine-based aquaculture in China has incrased by over 600%, from 3.5 tons in 1990 to 21.9 tons in 2008.
Photo Credit: Jack Parkinson | Flickr

Question by Tina .: Can you explain aquaculture and fisheries to me?
Why is it a critical technology?
Current uses?
How about the projected uses?
Leaders/companies involved in this critical technology?
You can just give me a source so i can reference to it

What do you think? Answer below!