Annual production of edible shellfish exceeds 10 million of which more than 8 million come from Asia.
China is the world's largest supplier of shellfish, with more than half of the animals in trade coming from there. These animals are obtained either by fishing or by farming in aquaculture.
Males solicit for female attention, and once they succeed, they mate for life. However, if a female is not interested in a certain male, she will scare him off.