1, the shape characteristics are different: king crab is spectacular in appearance, huge in size, oval in shell and red or orange in shell thickness. Spider crabs are relatively small in appearance, and their carapace is square or rectangular, light gray or yellowish brown.
2. Different living environment: King crabs mainly inhabit fresh water environment, such as rivers and lakes. They look for food and breed in the water. On the other hand, spider crabs live in estuaries and bays where salt and fresh water meet, and they adapt to the marine and fresh water environment.
3. Different places of origin: King crabs are mainly produced in Asia, especially in freshwater lakes and rivers in northeast China. Spider crabs are more widely distributed and can be found in marine and freshwater environments all over the world.