The differences between the two are as follows:

Coiliaspp, also known as saury and marlin, is a trichiuridae animal of Perciformes. As the name implies, hairtail is flat as a ribbon, silvery gray, with light gray dorsal fin and pectoral fin, tiny spots, black tail, and a fish head at the tip of the mouth, which gradually tapers to the tail like a thin whip, and its head is twice as long as its height, with a total length of 6500.

Freshwater saury is also called saury or saury, because it always goes upstream, so it is also called inverted fish. Shaped like a single-sided sharp knife, the back is thick and the abdomen is thin, the side is flat, the tail is long, the kiss is short and round, the scale is small and the abdomen is small, and the body is silvery white. It is a migratory fish, with a body length of 20 cm ~ 40 cm, a belly ridge of 6 cm wide and 2 cm thick, and a body length of 5 ~ 7 times the body width and 5.8 ~ 6.5 times the head length. The largest weighs about 250 grams. This fish lives at the intersection of rivers and seas, with a fertility of 20000 ~ 1000. It lays eggs and floats every spring, and the young fish hatched in that year mature after 3 years.