1. Supply and demand: Sea bass is more expensive than sea bass, which is related to supply and demand. Sea bass grows in the ocean and its supply is relatively small. Because of its delicious meat, it is favored by many people and has a great demand. The imbalance between supply and demand leads to the relatively high price of sea bass. However, perch grows in fresh water environment, with relatively large supply, relatively small demand and relatively low price.

2. Fishing and transportation cost: The fishing and transportation cost of sea bass is higher than that of sea bass. Sea bass grows in the ocean, so the fishing needs more complicated equipment and technology, and the freshness of the fish needs to be maintained during transportation, which increases the cost. The fishing and transportation cost of perch is relatively low, because it grows in fresh water environment, and the fishing and transportation process is relatively simple.