The invention discloses a 
tropical fish feed, and a preparation method thereof. The 
tropical fish feed comprises following ingredients, by weight, 27 to 32% of imported white 
fish meal, 15 to 20% of corn 
powder, 6 to 8% of 
wheat germ powder, 10 to 12% of defatted soybean 
powder, 8 to 10% of spiral seaweed powder, 10 to 12% of 
shrimp meal, 3 to 5% of 
yeast, 2 to 4% of composite 
vitamin, 1 to 3% of mineral substance, and 1 to 2% of 
carotenoid. The preparation method comprises following steps: (1) the ingredients are weighted according to the 
mass ratio above, and are smashed in a 
pulverizer so as to obtain 
raw material mixed particles; (2) 
purified water is added into the 
raw material mixed particles, an obtained mixture is quickly stirred to be uniform, and 
raw material mixture paste is obtained; (3) the raw material mixture paste is delivered into a sealed container for 
fermentation; and (4) the fermented raw material mixture paste is delivered into a granulator for 
processing so as to obtain the granular 
tropical fish feed. The tropical fish feed is simple for preparation, is balanced in 
nutrition, possesses color increasing effect, and is capable of increasing 
immunity of tropical fish, and improving ornamental value of tropical fish; feed particles are uniform; impurities are few; and 
water pollution is not caused.