Salmon and rainbow trout are as different as apples and pears

Q+A | Zhong Kai

Editor's note: Amid the raging public debate on whether the China Aquatic Products Processing and Marketing Alliance is right in classifying freshwater rainbow trout as salmon, Zhong Kai, a standing member of the Chinese Preventive Medicine Association and a food safety expert, shares his views with China Daily's Zhang Zhouxiang. Excerpts from his interview follow:

Biologically, what is the relationship between salmon and trout?