Many Chinese believe that fish attracts the chi/good energy that brings good luck, abundance and prosperity (年年有余 Nian Nian You Yu – an abundant and surplus-filled year after year)! The number 9 in feng shui principles is the most auspicious and complete number. Hence in many Chinese paintings, pictures, ponds or aquariums, you will find nine fishes in it. In feng shui, they believe that eight fishes should be red or golden and one should be black (which symbolizes strength).