1, the color is different. Guangxi Beihai sea duck egg yolk is orange-red, ordinary duck egg yolk is yellow. As sea ducks eat small fish and shrimp grow up, the yolk and egg white contains astaxanthin, the color will be more red.

2, different places of origin. Different living environments, sea duck eggs are bigger, shell harder. General ordinary duck eggs are inland small lakes or small ponds on the side of the artificial breeding of ducks laying eggs, usually fed on artificial feed.