When it comes to the fastest and simple growing business in the world right now, I would have to say fish farming is the best that we have at the moment. One thing that I have noticed about fish farming is that the demand for the product is quite high while the people that are selling them are not that much in number. All you need to start the business is the knowledge which you can get from attending a training course in your locality or simply by researching about it on the internet. The reason I should say that attending a training is a better choice is simply because you are going to listen to people that have been successful in the business as you learn from the tips that can help you grow faster in the business. Another thing is that fish is what the doctors are recommending for old people and those that are having issues with eating meals that contain fatty acids. So, getting involved in this type of business will have higher returns than losses in the long run especially when you begin it in an area where it is needed as well.