The main differences between Dalian flying crabs and Donggang flying crabs are reflected in their body shape and taste, both of which are related to the environmental factors of the place of origin.

1. Body size: Dalian flying crab is relatively small in size, and its shell is light-colored and slightly red. The Donggang Flying Crab is larger in size and its shell is dark blue.

2. Taste: The meat of Dalian flying crab is relatively firm and the taste is more delicious; while the meat of Donggang flying crab is relatively loose and the taste is not as delicious as Dalian flying crab.

In general, Dalian flying crabs and Donggang flying crabs are different in size and taste, and you can choose according to personal taste. In addition, it is worth noting that the environment where crabs are produced will also affect their quality. Therefore, when purchasing, you need to choose a reputable merchant to ensure that you are buying fresh and healthy crabs.