The difference between sturgeon and crab:
1, sturgeon belongs to sturgeon and other related genera, usually large hard-scaled fish, widely distributed in fresh water or salt water in the north temperate zone, with a slender body, a curved tail and a retractable toothless mouth under the protruding head. Such as: sturgeon mouth (sturgeon mouth).
2. Crabs are decapod crustaceans, especially short-tailed (true crabs), including other types, such as Anomura (similar in appearance and habits). About 4500 species, distributed in all oceans, fresh water and land.