1, the family is different: the dragon boat belongs to the plaice, tongue sole, tongue sole genus, commonly known as the sub plate fish, sole, sole rice, is a warm warm offshore large demersal fish, year-round life in the Chinese offshore sea area, with a wide range of temperatures, wide salt and adapt to changing environmental conditions. There are many species of cod, "such as Pacific cod", "Atlantic cod", "pollock" and so on, and the concept of cod is usually expanded to the cod family of fish, there are more than 50 kinds of them, and most of them are distributed in the continental shelf of the northern Atlantic Ocean. Most of them are distributed in the waters of the continental shelf in the northern Atlantic Ocean, and the important species are haddock, blue whiting, green cod, toothcod, Norwegian long arm cod and pollock.

2, habits are different: the fish like to grow in the warm sea, suitable for growth in the 14-24 ℃ water. Cod prefer cooler seawater, suitable for growth in 0-16 ℃ water. In addition, the fish mainly grows in our coastal waters, while the cod in the Pacific Ocean, the Arctic Ocean and other oceans are distributed.

3, the appearance of different: dragonfish and halibut development process is very similar to the gradual development of the "mouth and nose skewed" state, showing a light red, looks like a cow tongue, no fins. Cod is relatively large, after slicing it is into the kind of oval; and the kind of halibut sliced after the oval is not obvious, although other fish sliced similar oval, but can be seen from the appearance of its skin, generally speaking, like the cod scales are very dense, the skin of the fish bruises clearer lines, other fish do not have this special.