Sea mandarin fish is cheaper than freshwater mandarin fish because freshwater mandarin fish is one of the four famous freshwater fish in China. Freshwater mandarin fish has tender meat, less thorns and more meat, and its meat is petal-shaped and delicious, which is really the best among fish. Sea mandarin fish is a deep-sea fish, which will die because of the change of air pressure after being caught, and can only be sold frozen. The price is cheaper than that of freshwater mandarin fish.