It was not Zhang Tie's first time to go to a fish market.
When in Hidden Dragon Island, Zhang Tie had often visited fish markets. When in Youzhou Province, he also always went to fish markets. Fish markets being close to wharves were the best place for setting free marine organisms given the large quantities of marine organisms, low prices and geographical convenience. He could even rent ships to set free marine organisms away from the seaside, in which way, it would not arouse the attention of the others. Everything was ready.
Compared to setting free marine organisms, it was not that convenient to release other terrestrial animals.
Take setting free chickens, ducks, cattles or sheep as an instance, it was not difficult for him to buy them; but it would be very difficult for him to set free them in the wild.
