1, with different distribution areas. Seven-hole abalone is mainly distributed in Hokkaido, northeastern China, the west coast of North America, South America, South Africa, Australia and other places, while nine-hole abalone is mainly distributed in Japan's Fangzong Peninsula to Kyushu, the Korean Peninsula and the southern coast of China and other places.

2. Different living habits. It is difficult to breed abalone with seven holes, so it is impossible to breed abalone directly by introducing seawater, and it needs to be purified. Nine-hole abalone often lives in the intertidal zone to dozens of meters deep rock crevices, and likes the environment where the waves impact and the water quality is clear.